I've stayed at Bandara before, and was delighted to be able to book it again when I had to leave a hotel that was much worse than I expected (Bandara hadn't been available when I made the other booking); I was so happy to see Bandara was available, at a fair that-day price, when I was making an emergency new hotel booking at 3.30am in the morning!
Bandara offers a comfortable stay, with a decent feeling of space.
The building and rooms need a little bit of TLC, being a little worn and dated around the edges - but nothing major; overall, Bandara offers a comfortable stay, in a location that's great for reaching central Silom, or otherwise public transport to get about, as well as being easy for Grab taxis - a must - to reach.
The staff were as friendly as ever, and happy to assist.
Two minor things weren't great - having a 16- or 17-floor stairwell climb in flip-flops and a dressing gown from the pool up to my room one morning when the lift went out of action wasn't great, and the often terrible loud rap/hip-hop blaring out at the poolside at 11am was pretty off-putting, and not family-friendly or relaxing hotel music, but they're minor issues.
Overall, I had a other great stay at Bandara Silom Suites - my third or fourth - and would easily recommend it.