Yeah, just went back and it is not listed anywhere except via your provided link...interesting. Could this be an old link? Not sure.
Doing some quick reviews, it doesn't seem to be well known, but the reviews I found seemed positive...didn't really see anything negative. One review said they run this forum.
So, it is up to you, if you want to take the plunge. If you do, please report your experience for others.
I like to think I do my due diligence when making these kinds of purchases and I couldn't find a single red flag, so I went for it. If you just go to their website, it won't show those tickets, but if you use the link in the thread I posted above, it will allow you to purchase them even though they're intended for UK residents. It's a wonderful deal. I really only needed 5-day (3 park), park-to-park tickets, but these were way cheaper than that, so for me, it was a no-brainer once I felt comfortable about the company.
I bought the explorer ticket back in February for our July trip. Transaction was immediate but it said we would get another email when they were shipped. I was getting nervous after a week with no correspondence but then they showed up magically in my mail box at exactly one week after ordering. Great price and fast service- my only concern was that they were delivered in my mail box - no signature required. With no shipping or tracking info sent I would have never known if they weren't delivered correctly. But alls well that ends well . So far...