Information and search is usually easier and more comprehensive on the original site. With that said, there has to be a good reason for me to visit an aggregation service to view that information. For me this site doesn't do it for me. All your doing for me (in the housing category) is plotting Airbnb & 9Flats on a map, which since there are only 2 sites doesn't add a ton of value for me. I would rather go directly to Airbnb to find potential housing because more owner information and more powerful search options.

Again, I think aggregation adds true value to consumers when you save them from visiting 10+ websites, but not from 2 or 3.