https://bitspend.net is a far better service for a number of reasons:

1. Public identities and I can visit their office anytime in FL. (All I can tell about Bitsumo is their email is recr3ate@gmail.com and he states he lives in Switzerland. Do they have a business license?).
2. The order page is secured with https...Bitsumo is not.
3. Offers anon buying so want a VPN? No problem.
4. Has been around longer and has a long list of excellent feedback. http://www.reddit.com/r/Bitspend