I guess you were not part of the Galaxy Class GB... Well they had a lot of problems with the checkout process, in my case I bought at first only the base set and the Battle Bridge child, I wanted to add later on also the Numpad and the Tsangan...well that did not work. I added the kits in my basket and there was no way to checkout, the error was Shipping Address 1 missing or not checked, only when I selected an item with shipping included from an other GB I managed to checkout, 4 minutes before the GB closed and only for Tsangan set
. I have signaled the problem to SP 4 days before the GB closed with a lot of follow up e-mails and PM's and posts on the PMK forum, they were aware of the problem, but did not solve it in time. At least after the GB closed SP did a great thing and issued manual invoices to people who had the problem. This way I got also the Numpad Kit .
Also there were issues with the login, I had to reset my password 3 or 4 times...
SP needs to work on the site, also a big issue is mobile compatibility, that is close to none ...
PMK is a great concept, that enabled some cool GB's (SKULL Squadron, Granite, Vim, Galaxy Class), but it still lacking maturity and the bugs are only driving customers away