I'm there right now, it's a very good place to start out when first landing in Hong Kong. We are leaving soon, but it's been a good couple months.
1) It's location is excellent, you are 1 exit from Hong Kong side and in the heart of TST.
2) The apts are good sized, but there is sometimes a waiting list for 2bedrooms. They aren't impossible to get, but they come and go quickly.
3) You also pay only $150HKD/month and you have membership to Pacific Club. It's a really nice facility, quite big actually. It's a great gym, plus a nice kids area! They have a ping pong room, a fooseball and airhockey table, and a free little gaming room with PSP, Xbox and such. Plus a play area with blocks, books, pitball area and a small gym slide area. Plus there's a few restaurants, a huge pool with a view of the harbour, and tennis courts on the roof. Tennis courts, squash and table tennis courts are extra charge, but nothing too expensive. Nice spa, a bar (we watched some world cup games there, they always show sporting events there) and they have a tiny rental movie club (I think it's $150/month for unlimited rentals) which the kids love but its a limited selection.
4) You've also got the star ferry a quick walk away, plus the Macau ferry is right behind the apt, plus if you have guests they can stay at any of the 3 Marco Polo hotels attached to Harbour City.
5) Not to mention the shopping, you don't have to leave Harbour City if you don't want to, it's pretty mammoth in terms of restaurants and shops. And if you do want to do high end luxury shopping, you are in the heart of all those shops as well on canton road. If you are a big movie buff there are 2 movie halls playing both chinese and english movies, one on one side and on one the other side of canton road, plus a few blocks away is iSquare which has a really nice Imax theater and regular movie hall as well. Plus Elements is 5 min. away by Taxi, more shopping, restaurants, movie hall, and an ice rink!
6) Concierge is friendly, everyone is pretty nice they try to make you feel comfortable.
7) Grocery store is in the mall, City Super (although everything is imported and expensive there but it's a nice store), a more local shop is Welcome it's a couple blocks away off of Haiphong road if you don't mind the walk.
Overall I think it's quite a nice place, and a lot more spacious then many other service apts. We looked at others and I felt like their bedrooms were closets, or some of them didn't include utensils or other things. I think it's a good choice.