I've signed up to this forum specifically to I can write this one comment.
I've loved GTDNext over the last two years, it's really helped me. I started off with ThinkingRock, then (when my company stopped allowing it) tried Todoist, Anydo, Doit.im, TSW (via Evernote). Finally I found GTDNExt and have been a paying customer for 2 years. However, the last, I'm gonna say 3 weeks, have been incredibly frustrating.
I've spent the weekend waiting for GTDNext ot be up so that I can export my lists to Dynalist, which I like because of it's similarity to GTDNext. I've set up my lists over the weekend and this morning I've tried to get onto GTDNext to cancel my subscription and found I can't because the site's down again.
I've just checked again and it's back so I've deleted my account. I expect that this means that I will receive a refund for the 9 months of the forthcoming year that I've paid for, but won't be using.
I don't know what your MTBF is currently, but it's low enough to force me to move. Let me know when it's higher than 6 months and I will consider coming back.