The c64 maxi doesn't have any IEC ports so it can't use any of the original floppy drives.
It's also not a PC so it can't run opencbm or the zoomfloppy or related utilities.
Basically the c64 maxi is a raspberry pi in a case that looks like a c64, that's all it really is.
It's something that looks like a c64 but doesn't even come close to functioning as one.
The best modern replacement of a classic c64 would be the ultimate-64, and you can get a really nice 3d printed case for it.
But they cost a bit more.
It comes down to what you want and need.
If you want to just play a bunch of the games, nothing serious then the c64 maxi might do, but even then I'd say a retropie would be a better alternative (except it won't look like a c64)
If you want to do something serious then get either a real c64 or an ultimate 64.
Real c64s are very rare now, massively overpriced on ebay. More than an ultimate 64 would cost in most cases.
There's also the pi1541, it depends what you want or need...