This place is located in one of the best areas. It's super close to the Wan Chai station, has a lot of great restaurants and stores around the area and is at walking distance of Causeway Bay.
The place has great airconditioning, and the two toilets are definitely a plus if you're with a larger group. One of the bathrooms in the room has a shower as well, but I don't really recommend showering there, as the water will fall on the toilet and it's pretty small.
The appartement is not that big, but can easily fit at least five guests in it. The washing machine in the appartement was really nice to have. The beds are a little hard, but I had no trouble sleeping and didn't have any muscle pain.
I do recommend taking your own towel(s) with you if you're staying for a longer period. There were only five and my family of five were staying for three weeks so we bought our own.
Amarjeet was very easy to contact, he explained everything very clearly and responded fast as well. If I return to Hong Kong, I will definitely look up this place again. Great location.