Booked the hotel after reading that it was on Sukhumvit & incorrectly locating it in Google maps. We soon realized that Sukhumvit is a really long street and in reality this hotel is pretty far from downtown and all the hustle and bustle of Bangkok. Based on the location, I wouldn't recommend Sabai Sabai to anyone who is looking to go out a lot in the city or see sights, as you'll end up spending half an hour to an hour each way getting to these activities.
The hotel is close to BKK airport and transit lines, so if you have a short layover in the city, it would be much more suitable for that.
Our room had probably a good two dozen mosquitos when we arrived because the window was open. We called the front desk to take care of it, and they sent someone to spray DEET (while we were still in the room). I would imagine if it's such a common occurrence, some more permanent solution should be achieved, such as anti-mosquito devices, etc.
The redeeming features are that the hotel is cheap and clean, the front desk is 24h and the hotel's kooky decor, if that's your thing.