I tried to avoid reviews but I had read some mixed opinions, mostly negative to be honest. But I mostly liked it.
I was expecting it to be sickeningly fan-servicey, which it was to some extent (the constant repetition of the phrase "want to believe" was bordering on ridiculous) but most of it was handled a bit more tastefully than I gave it credit for. For example, the 'pencils in the ceiling' shot, which I knew was an inevitability was actually handled a lot better than it was in the second movie, where it makes me cringe every time.
Some of the dialogue was sketchy, to say the least. Another wave of script editing might have done the trick. At one point, O'Malley said something like "I want to know my ass is hanging by more than just a slender thread." Sounds like they got three different people to write the beginning, middle and end of that sentence and not tell each other what they'd written.
This episode also highlighted one of the things that always kind of bothered me about The X-Files in general, especially later seasons. The fact that this is a show mostly about one man's quest to find out these deep dark secrets, but then there are just hundreds, if not thousands of scientists, doctors, soldiers and other military personnel, and god knows who else who seem to know all about it. It makes Mulder's look stupid. It was all much more dramatic when it seemed that it was all being done by a small mysterious group of men.
The new direction of the conspiracy seems interesting, although I confess I'm not 100% clear what that actually is. And another problem is that they didn't even acknowledge the the fact that aliens were supposed to have invaded on Decemmber 22nd 2012. Or was that stuff all part of the Massive Lie™ that Mulder kept referring to in this episode? I'm a bit confused about that.
I did start this by saying I liked it though, and here's why (other than the simple fact that my favourite show of all time is back on TV):
I liked the Roswell stuff. Roswell has always fascinated me. Something happened on that day and we can only ever speculate as to what that was. This episode put a nice spin on it (although the CG of the injured Alien will not age well).
I actually liked the awkward relationship between Mulder and Scully. A lot of the shippers (who think they are fans of the show but are actually just fans of Mulder ans Scully's relationship) were very pissed off about their break-up, and haven't stopped crying about it on Twitter and giving Chris Carter a hard time. But I think it made sense. In fact it follws on naturally from the 2nd movie, which was already sowing the seeds for some incompatability issues. It worked and I think it is better for the show in that it can now focus more on the pair solving paranormal cases and less about them kissing and cuddling
So overal, yes it was a flawed episode of TV, especially for a mythology episode, but it was by no means as bad as some of the original episodes could be. And I hear stirrings that episodes 2 and 3 are better, so fingers crossed.