Stayed in the Blau Hotel in June 2017. Hotel is well maintained and has great pools and outdoor facilities, but for us as a young family was let down by a few issues.
We'd chosen the hotel because of its family-friendly credentials, esp. because we wanted creche or mini club facilites for our two-year-old.
Access to balcony (and uncomfortable plastic furniture) only through living room, so no way to go outside while toddler was asleep without disturbing him. Neither of the hotel restaurants had high chairs available. Booster seats were available in the main restaurant, but had no security harness, so again not suitable for toddlers or babies. We discovered that you can hire equipment from an outside company at extra cost (leaflets in reception) and would definitely recommend this.
We tried out the mini club for one morning but it really wasn't able to deal with kids this young, and we weren't comfortable leaving our toddler there. Staff seem to be great with older children, and the kids' clubs for ages 4+ appear popular and well run, but the club for the youngest ones isn't suitable unless your child is pretty self-sufficient (toilet-trained, able to & will remember to get their own drinks etc.)
Finally, mosquitos were terrible - our son was bitten 30-40 times in two nights while in the room and we killed 9 mosquitos in the bathroom on one morning alone. Hotel reckons nothing can be done about them, so take spray, anti-itch stuff and a plug-in.