coingarden.ca is designed for people with 10 or more coins at 2 or more exchanges.

I think if you meet this requirement, you will see the benefits.

The goal of the site is to have one place with a master portfolio showing convenient groupings and their totals.

I have bitcoin at 5+ locations right now. coingarden.ca shows me just my bitcoin total converted to my favourite coin and fiat currency right now.

Watch this site. I am going to town on exchange APIs. Expect regular improvements.