I met the Ethbits guys at the cryptofest in Manchester on Friday. They seemed legit and a lot less scammy than any of the other alt coins people there. If im correct they are trying to become the etorro of the crypto exchanges. It sounds a great idea, but I would be focussing on the top 150 currencies not the top 15. (That might be logistically impossible, but 15 is no where near enough and 150 should at least be the aim).
I would also question the teams ability to get enough punters/traders to make the site viable...

However everything else looked good so I will invest all my Ether into them which should see them get a couple of hundred from me.