Casa Cristal is a lovely hotel. The boutique part of the title means that it has a great deal of charm and is small. I will say without question, that you have one of the best views of San Jose which looks amazing up in the hills at night. Everyone on staff at the hotel was extremely friendly (with the exception of the security guards) and lived up to the reputation of Costa Rica. If you go, do not select room 1. It is worth upgrading to a higher end room. Room 1 sits directly outside the lobby and main patio area. This means that you will hear a lot of noise from other guests, hotel security, and from the neighborhoods of Escazu.
The hotel includes a free breakfast in the morning although it can be quite heavy and I would not recommend it to anyone who is traveling. The pool outside is nice and the outdoor area is good. The overall hotel is very small and only has a few rooms in it. The place has the feel of a converted mansion as opposed to a hotel. Within the hotel there is very little to do and so if you are looking for this to be your primary getaway spot, you may want to consider something else.
Escazu is a main commercial/trendy area of the San Jose region. That being said, transportation is absolutely a challenge. This hotel can be extremely difficult to find so I would recommend printing a map out. For me on this trip the hotel said they had arranged transportation, but they messed up the dates. They were very apologetic, but that didn't make the process of finding transportation at San Jose airport easier. That being said, the reason I wasn't too upset is the guy that I ended up finding was incredible and knew every part of Escazu and where the hotel was. He was not affiliated with the traditional Orange Cabs that you see at the airport, but was some other type of private transportation. Normally I don't recommend taking this type of gamble in a foreign country, but for me it worked out.
In terms of getting to the hotel, the roads are windy and in some sports by the hotel unpaved. Even the locals have trouble finding the place, so provide the map to your driver at the airport because there is a good chance even they will get lost. Like I said, I lucked out with my transportation. It also is worth arranging transportation back to the airport with the same driver if possible. If you are happy with your cab experience and they can get you to the hotel, then stick with that person because finding cabs at the hotel can be challenging. It is a 30 dollar cab ride one-way so it tends to be lucrative enough for repeat business potential. The managers of the hotel can also be difficult to find as they are often tending to other duties, so when you check out, if you have not prearranged transportation, you might be waiting a while.
In terms of convenience, this hotel it not ideally located within proximity to the airport. While it is 25 minutes away in no traffic, it can take up to an hour to get to the airport depending on the time of day. If you are planning on simply spending one night in San Jose as your primary junction point to another destination, then this is probably not the best place to be. There are cheaper hotel chains closer to the airport with more amenities, although be careful as safety can be an issue from time to time.
The overall neighborhood around the hotel is fairly rural with small houses and huts primarily in the immediate vicinity. The main area has some very nice restaurants, but be prepared to either drive or cab as walking is not really a viable option to/from the hotel.
While this review may seem somewhat negative, I would say that the actual hotel itself is very beautiful and the rooms are extremely clean and comfortable. The beds are great and there are obvious amenities like television, ironing boards, ample closet space, and a room safe. The bathroom was extremely clean and overall the place had felt modern. What I would say is that if you plan on staying in San Jose for multiple days or if you want to be in Escazu, this is a great place to check out. The hotel is extremely isolated and tranquil, although you can hear activities in the neighborhood if you are in the wrong room. The rates are reasonable and the hotel restaurant is good for a night or two.
So with that I will say that choosing this hotel is largely based on your preference. If you are looking for a traditional American style Hotel with tons of amenities and convenience, this this is not the place for you. If you are looking for a charming place in Escazu that is a little off the beaten trail, then you should give this place a shot. You will definitely feel like you are experiencing something very unique here.
My last piece of advice is that arranging everything through Hotels.com worked out perfectly for me. To be safe, I also confirmed with the hotel a few days in advance and everything was in order and taken care of. I did not have the same luck with other places after I left San Jose as I booked with them directly as opposed to Hotels.com. Make sure to confirm transportation if the hotel has arranged it for you and ask for specific instructions on where to meet the driver, what company they are with, and how you can identify them. Getting out of San Jose airport isn't a challenge, but you will be besieged with cab offers, rental car companies, and so on. You may have to walk around a bit to find your guy. I also recommend having a local phone or a phone card to contact the hotel if something goes wrong. I lucked out in that the guys arranging transportation at the airport had phones and because I had all my information with the hotel, they called and squared everything away. Had I not done this, I might still be at San Jose airport trying to find my way to Escazu.