Nida's place is just the right size for solo travelers: enough space for bags and such, but you're not paying for more room than you need. Two people could make it work, but it may be a little cramped, depending on how much you're bringing.
The location is just about perfect! The MTR station is only a block away, and the neighborhood is very safe. One thing to note: the apartment is on the third floor of a walk-up building, so if you don't do well with stairs, this place might not be for you. If you don't come expecting luxury, you will have a great experience here! Nida is a very responsive host and was even kind enough to meet me at the MTR station the night I arrived. My trip to Hong Kong was great thanks to her!