I'm generally not a fan of remakes/remasters that do essentially nothing but change the artstyle for no reason. Yet, despite some unfortunate missteps (W6-3 in SMB1 and many W8 levels in SMB3 are no longer monochrome), I do actually prefer the aesthetics here. The arranged music by Soyo Oka is excellent as well.
The only real flaw for me is how the brick physics work in SMB1/LL. In All-Stars, hitting a brick block as Super or Fire Mario will cause you to jump through it instead of rebounding. It's not game-changing, but it feels a bit awkward and forces you to wait longer before hitting more blocks. Luckily, there's a patch that fixes this. There's another patch that restores SMB3's Famicom difficulty, where getting hit while powered-up always reverts you to Small - highly recommended. These patches work with both All-Stars and All-Stars + SMW.
Ultimately a pointless remake, but nonetheless my preferred way of playing the original Mario games.
The only real flaw for me is how the brick physics work in SMB1/LL. In All-Stars, hitting a brick block as Super or Fire Mario will cause you to jump through it instead of rebounding. It's not game-changing, but it feels a bit awkward and forces you to wait longer before hitting more blocks. Luckily, there's a patch that fixes this. There's another patch that restores SMB3's Famicom difficulty, where getting hit while powered-up always reverts you to Small - highly recommended. These patches work with both All-Stars and All-Stars + SMW.
Ultimately a pointless remake, but nonetheless my preferred way of playing the original Mario games.