There was a strong smell of bleach in the room and corridor. Especially, the bleach smell in the swimming pool and gym was so strong, my partner and I had to quit the exercise after 5 minutes in the running machine and cross trainer. Still after that, we had skin reactions on our eye lids.
The only good thing is the location - 10 minute to Nana BTS station. Having said that, I would find another hotel in the similar area next time I visit Bangkok.