I use the Memotron in my home studio, where I also have a Mellotron M400. If I do a comparison between the Mellotron sounds and the Memotron, there is not a great deal of difference.
I like the simple controls, mirroring the M400 control panel. Love the sounds.
I also like the metal construction, great quality.
Navigating the menus is easy and intuitive.
I like the onboard effects.
It is expensive. Although not as expensive as the M400.
Compared to popular synths, it does take time to navigate to load another frame.
I’ve not used MIDI on the Memotron, so I can’t comment.
Overall, if you want the Mellotron sounds, then I would recommend the Memotron. The samples are taken directly from the output of real Mellotrons, not samples of the Master tapes. This gives the Memotron an authentic capability.
Like this a lot.