If you do a search on Docklands you will get all sorts of information and opinions.
Personally I don't think Harbour One is going to be the best of Docklands IMHO. It's actually set a little back from the water unlike some of the older buildings. And yes, it is a bit quiet that side of Docklands, but getting busier and more of a 'vibe' slowly.
Look the short story is that a lot of ppl lost money with off-the-plan Docklands apartments. They just built so many all in the space of 10 years(or so). The body corps are pretty high so the rental yeild is not the greatest. The banks don't really like the Docklands postcode (even though they've got swanky new offices in Docklands
) so getting the loan you want might be tricky too.
Having said all that, we decided the area has great potential and could see ourselves wanting to live there if the choice was ours. Soooo we bought an IP in Yarra's Edge (other side of Docklands) in Lorimer Street. Ours is furnished which helps the rent.
Without knowing your budget and other details, not sure what else to tell you.
Hope this helps a bit.