I finally got to use my new LX7 yesterday and all I can say is "WOW" I love this thing. Took about 5 minutes to figure out what screen options I wanted and make all adjustments as far as sensitivity etc. The only problem I have is my charger won't turn green but the voltage reads HI V on gauge so I guess it is working. I have not been able to look at the vex 28 for comparison.
I have the LX7 myself, and I've found that if I don't charge my unit for a while or if the battery is really low that it takes a looooooong
time for the charger to turn green. Eventually though, it always does. We're talking like 36 hours long though.