Just used my 16x5 last night and I like it a lot so far. Really really like the discharge with the average volts reading. Charges just as good as other chargers- no overcharging! Two built in cooling fans that shut off when not needed. Two leads that are separate from the chargeing wires for acurate meter readings. It has a cycling mode too that i haven't tried yet. Only gripes are that there isn't a script for nimh or nicd and the sticker they put on the case is paper and printed with an ink jet even though there are nice silkscreened graphics below that. All in all not bad for $170.
Also saw optional back light screen and a heat sensor attachment for the 16x5.