Top positive review
a bit of extra details
November 3, 2018
Best of the bunch is X-X4 and X8, X5-X7 are pretty average. As others have mentioned, the game card has X-X4 (the first collecion), and a download code for the second collection (X5-X8).
For general overview check other reviews, here's a few details from someone who's played the originals, and my initial impressions of playing a bit of each.
While X8 is the best of the second half and more of a return to form to the classics, looks like they patched the infinite money issue. I'm a bit miffed by this actually, I don't have time to grind the metals (and 40k per the extra ... is kind of annoying). I think the game's worse and has less value to me, personally, for removing the shortcut, even, that and being unable to unlock the extra ... with the passcode, that seems to have been taken out, though it worked for one of them (if you translate the ps2 buttons to Switch). I mainly only wanted X8 from the second collection, so I'm bummed that the cheats and the money bug seem to be removed. Means I have to beat the game and grind a fair chunk to actually play the game the way I want to (with mixing and matching with the extra ... ). By that time, I'll have already beaten the game, so I won't have interest / time to rehash through it all over again. Wish they just kept it true to the original emulation, as the bug didn't break the game, it just gave more options / removed the grindiness from it.
Minus all that, games seem to play pretty well on the Switch, feels comfortable and natural enough. Some games felt a bit slow (X6, from the bit I tested), assumably that's just because the times have changed, and the games were just slower in general.
If you're a newcomer, I'd recommend just getting the first collection digitally, and if you're really like the series, could try for the second. Or could try to get it on a sale. Just know the level/game design of the latter half isn't as good as the original.