The firmware is user-upgradeable and I am proud to be the originator of a few ideas about the ergonomics and the "SWR Alarm snooze" feature which Larry implemented in the firmware.
There is a great Yahoo Group for technical support and discussions!
Both of my units - LP-100 and LP-100A integrated in my shack. LP-100 (with the green PLED display) is showing the transceiver output (input to the linear amplifier). LP-100A (blue VFD, I actually used gel filter to get the nice blue color out the display) is showing the output of the amplifier.
Looks like the amplifier does a pretty good job. The T-mode is very helpful during tuning!
In vector mode, the meter displays a lot of very useful information about the antenna!