Their on-site tools are total garbage, so I tried playing with their API... and it was also a giant pile of trash. Random exceptions, timeouts, incoherent structure all around. 0/7 would not play with again.
The API wasn't too bad, but it's woefully under-documented. The sample code is worthless. I also don't like that you have to implement it all and run it against test before you get production keys, but no biggie.
The bigger issue: I uploaded my catalog 2 weeks ago, and all products are still "under Jet review". I emailed and they said some partners have waited over a month.
The bigger issue: I uploaded my catalog 2 weeks ago, and all products are still "under Jet review". I emailed and they said some partners have waited over a month.