Love all the games included, these are a huge part of my teenage years, and I loved the opportunity to play them all again without resorting to emulators. I do have some issues though.
Firstly, the lack of polish on the presentation is questionable, there's so much more that I would have loved to have seen, like unlockable 8-bit games, some more game modes, comics, something like that. Secondly, Sega's tiered DLC system is deeply flawed and means you end up paying extra for the game and not getting anything that was truly worth it. Thirdly, and this is the big one, the missing music from Sonic 3 is a massive loss to the overall package. I'm well aware that it was due to copyright issues, but the beta versions of the music that was used instead is just not even close to the same level. I'm sure Sega could have resolved this somehow if they really wanted to.
It's a shame, because I love the cutscenes added, and for the games themselves, Origins almost deserves a 10, if only Sega had put a bit more love into it.