I've only ever been through Minot a few times while driving to and from Ontario via the US route, but this hotel is about as good of a value as you could imagine. Rooms are large and clean, beds are comfortable, entire hotel and surrounding area seems very quiet, parking is ample, a pool if you want one (no hot tub though), and they throw in a very basic continental breakfast to get you on your way in the morning.
I have paid two to two-and-a-half times more in other cities for a hotel as comfortable and clean as Sierra Inn. Would definitely continue to use this hotel as my road trip sleepover site!