To set expectations - I am a local HK-nese who now lives in the USA, usually stay at Langham place if I travel with hubby due to family in the immediate area (mongkok). This time, try Pop Hotel to save some money as I am traveling solo.
SIZE - yes is not a big as others but we are only talking about missing the areas are that one place that we lay our luggage down & the bathtub. Hotels in HK don't offer big rooms anyways, and this is definitely bigger than some Business hotels that I have stayed in Japan for solo travellers (and paid less at Pop). Had a room with 1 bed (is like 2 twin put together king), clean, new, has all that one needs - safe, tv, coffee, dresser. everything is very decent, other than I have to stand my luggage up by the wall the entire stay (which is not a problem for me).
Location - Great & Safe - get out of the hotel thru the "automatic door" then go to your left, walk straight 2 blocks (1 block is 1 min in HK) down "soy street" then turn left at either Shanghai st (that's the Langham mall down 2 blocks), or keep on soy for another 2 blocks till you see "Nathan Road" then turn left. those are the 2 most convenient MTRs stations with shopping along (i would say 5 min away from hotel). Others mentioned the brothels along, don't worry, no one bothers you on the street - they are just "signs" and no one "stands on the street" like in other countries. I have got back to the hotel as late as 2am, and there are still regular people on the street & mini bus station right outside of the hotel still in service (Mongkok is a busy place, many restaurants open 24 hours and shopping till midnight).
Quietness - agree that walls are thin, just hope u don't get the room right next to the elevator -elevator is loud (my room was almost at the end of the hallway so all I heard was door closing from "neighbors" when they take off or in the middle of 1 night, my neighbor coughed in her sleep. so that tells you, the location itself is quiet, no road noise (had the AC on the whole time, windows shut, curtains closed - no view at all anyways). I had no trouble falling asleep and staying asleep but I can imagine light sleepers might suffer (but they usually wear ear plugs anyways =) )
Cleanliness - Clean & Brand New Hotel, modern decor - no complaints there.
Value - paid $570HKD ($74 USD) each night (stayed 3 nights) in advance. Booked thru agent online , submit my request, the they confirmed availability and I paid.
Overall - Excellent Value for location & this brand new hotel. Would stay there again ~
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC