The JPI 730/830's are a nice bit of kit, I've installed them into a 421C and a 402B recently. Unfortunately one display was DOA out of the box but JPI shipped a replacement immediately, and one required a complete hard drive erase and reload, but once again JPI emailed me the program to do that with no hassles
Also recently upgraded an old Insight GEM to the latest G3 with prop vibration etc, this one is in an F33A with a 550. Very nice, super capable unit let down slightly by the smallish screen and placement of the buttons, but if panel space is tight it's an excellent option
Support from Insight and JPI was great and they're both releasing regular software updates
me.