Forty years with M&R and now the past two with ROQ. Love them, although theres no such thing as a perfect press that suits everyones needs. Withe ECO and YOU, the index drive is Geneva. The next uses a chain drive (more on that later). Main con with the former two uses a traffic light tower to tell the op when the pallet is in lock position. Seems like a simple mechanical spring loaded pin to set it in the required locking position without having to keep your eye on the tower would be an affordable upgrade. Also, on my machines at least, often when you break a safety bar you may have to walk over to the bar, reset, and back to the main to continue. Not always, it depends on the sequence of actions. Too many footprints. The pallet lock is spring lock and allows for multiple position settings however over time, the small nuts can loosen and be a bit of a pain to replace (if they fall off, they can be difficult to find). On my ECO, we have to replace squeegee chop solenoids twice and need to do it again. This requires removing the print arm as it is not easily accessible. Not for the timid.
That said, they are not over engineered and super easy to train new ops. Squeegee travel simple and manually controlled without kipps.
Back to the indexers. The Geneva allows the op to free wheel the pallets using the tower while the Next chain drive uses the half index mode and allows the op to send the pallet from head one to head 8 etc. without stopping at each station. Huge benefit on larger machines.
Also the Next has hugely upgraded analog main menu with no sub menues.
Interesting to know that M&R makes a lesser known press called the Copperhead which is basically a blue ROQ.
