I have stayed in I-residence for a few times and twcie, I was upgraded to better room, that showed their appreciation for customers.
Their standard room, though small-ish but their beddings are excellent and cleanliness is above average. Breakfast spreads are quite well, not luxurious but good enough to last for the day.
Right in front of the hotel is the Chong Nongsi BTS, you can go anywhere you might want to go with BTS right at your doorstep. Nightlife and night market is a stone throw away, which added to the plus side - near enough to walk but far enough to avoid the hustle and bustle.
Overall, a pleasant and convenient place to be a base of mid-budget travelling.