Every time I do anything in Groups (join a group, go Back, refresh the page, cancel a new Discussion) I see the "Welcome to Groups Beta" popup show up again. It interferes with enjoying the experience!
Also, I am on a pretty decent Mac laptop screen, and the button to dismiss that popup seems needlessly below the fold. This probably wouldn't annoy me too much if I wasn't dismissing that popup repeatedly.
Other than that, things are looking pretty good Spock!
If you don't receive the email within an hour (and you've checked your Spam folder), email us as confirmation@grabcad.com.