I've stayed in this building multiple times. It's not in the heart of the Bukit Bintang action, but it's good because in the immediate vicinity there are multiple cheap, good restaurants that give a decent slice of KL life. And, there's a good cafe at the end of the shopping strip that works well for getting laptop work done. And three handy stores that have basic stuff.
The unit's separate bedroom is great: I worked in the apartment (it's definitely not a hotel room) a fair bit, and the wifi was good, furniture is well made, and I felt comfortable getting up in the morning and planning my day, and unwinding at the end of the day...