I just spent 9 nights in this hotel, located in soi 6 and very close to Nana Plaza and Nana BTS.
Needless to say, is guest friendly (they don't charge you for bringing someone to the room).
First of all: my room wasn't the most basic/cheap, since it had a bedroom + living room, while with the cheapest price you get a studio apartment.
Having a washing machine in the room was very comfortable for me (I'm not 100% sure but I think all rooms have one).
Bathroom was good (but only shower and no bathtub).
Staff is very nice.
It has a balcony, even though the view from my room was non-existent.
Unfortunately, the wifi in the room was very slow and often wasn't working at all (forget to have skype calls). I think this is the only downside I found, sadly for me since I need it for work, but probably not so important for most people since 4g always works well.
Price tends to be a bit higher than the average but you can find good offers, and if you plan to spend a lot of time around nana plaza this will be money well spent in my opinion.
Hope this helps!