If I may give you my feedback I would love two things.
I would love to have more clear indication of group buys in which I participating. Everything is currently indicated by red coloed buttons "This group is full" and "Unreserve" and full group bar is red too.
I think some background color would be better. Somethink like (Check image below) Color is random.
At same time in tag filtering I missing something like "my reserved" (buys) only.
PS: I really like that you cut the name list today its far more clearer.
I've just pushed an update that will show your reserved group buys in green on the list. You can also see your reserved buys on your profile page.
Very nice. Thank you.