My bf and I really enjoyed the week we spent at Dave's place exploring Mong Kok. It was a nice home away from home. Dave was easy to communicate with and checked in to make sure everything was okay and dealt with our questions quickly. I do want to point out that there are some (20) stairs before you get to the residential lobby and elevators. Not a big deal, unless you have heavy bags or bad knees.
The apartment is really well located - a block or so from the MTR (maybe four minutes), a couple minutes from the Fa Yuen street market, and 10 minutes walking to the flower and bird market (which is actually sad- can't recommend seeing the birds.) I think it took me a half hour or so door to door to get to LKF bars one night. There were some construction noises during the day and random beagles on the roof next door. But no street noise or anything at night.
The bed was comfy and the kitchen was nice to have, even though you really don't need to cook with all the restaurants around. Unless you want a western breakfast before 11 - then you should buy some eggs. :) I can recommend the 1973 fried chicken place on Bute Street, and Coffee Talks around the corner. If you head towards the flower markets (which you should) there's Marilyn and Cafe Royal Garden that have proven to be quite tasty. See? Lots of things around to try out. We'd definitely come here again - I'm sure there's always more to do.