As indicated in the ratings, the flat is great value, comfortable, well-furnished and currently bran-new; the view from the spacious balcony sums up KL's contrasts; the communal swimming pool is wonderful; the staff are friendly.
The small studio flat is very convenient for Bangsar station, one stop from KL Sentral which is an awkward walk away. There were shortcomings in the check-in, as the EST staff were not aware of the nature of the arrangement with Plush, who run the flat (ie the listing as EST is slightly misleading), and it was left to the cleaner to explain the arrangements in limited English; she was not clear whether the booking was Expedia or Air BnB, and what payments were due. A quick run-through in the flat of basics would have been useful, such as door-opening, use of the elevator, how to use the facilities etc and where to leave the key on departure, but shortcomings in this type of help and explanation are, in my limited experience, standard in KL: for instance, an EST check-in staff member found it hard to understand what I meant by buying a stamp or posting a letter, let alone being able to advise me where I might be able to do so. But that's KL.
Tall people beware the low ceiling when getting out of bed in the cosy mezzanine; and careful when coming down the narrow steep stairs from the sleeping area.