The only problem i ever had with Sega genesis was all the multiplate games. Like Street Fighter 2 Turbo is better than Sega's CSE. Mortal Kombat II-?? are all better on the SNES graphics, colors and controls.
One thing I dont get about this mini console is why are they releasing the 3 button controller? I thought sega later on did a 6 button one to compete with the SNES? Since a lot of multiplateform titles used all 6 buttons