I stayed at Berkeley Park about a year ago, and whilst the staff were superb and couldnt do enough for me, they were undergoing a major refurbishment, which caused a few problems.
However ......... what a transformation !! Well worth the wait, this block of now extremely modern serviced apartments, which now include all the mod cons including playstation boxes, is located on a quiet and secluded crescent, just minutres away from Heathrow airport.
Wireless internet is free, I had a superbly equipped kitchen, the beds are probably some of the most comfortable I have ever experienced (I am told this is due to something called a Heavenly bed topper - a standard for the company!) and the cleanliness of the entire apartment was 5 star !!
However what truly makes these apartments stand out from the massive blocks of impersonal Heathrow hotels is the staff and the attention to detail. Nothing was too much trouble. I did not have to deal with the hoards of aircrews, delayed passengers being bussed in and out. The staff knew who I was, which apartment I was in and truly made my stay a world class experience !!!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC