I have placed multiple units with a VERY reputable company in PA that conducted significant testing of the durability and ease of use
Roland LEF UV Ink beat out Mimaki, a Direct Jet & Pad Printer when it comes to scratch resistance and durability.
They conducted tests on remotes with button pressing over 500 times, letting the unit sit in 85% humidity for 5 hours, wiped it with 409 and then cleaned it off 25 times then button pressing 500 times more. They completed 10 rounds of this testing before giving me a PO.
I have the results from them. If interested in any further info PM me, but the fact is Roland wins over the rest hands down.