I've recently switched to Jobo (with motor base/lift) from using an HP combi-plan T for 4x5 development.
Originally Posted by Rui.Cardoso
The combi-plan worked great. Yes, it leaked slightly, but I just loaded an extra 50mL of chemistry to compensate. Yes, if you weren't careful loading film it could jump the tracks and touch the other sheets.
Loading the HP combi-plan film holder was much easier than loading the 2509 reels for the Jobo (I don't have the loader base - those are really expensive).
On the other hand, the Jobo uses barely more than 1/4 the chemistry that the combi-plan did.
So far I've ruined exactly one batch of negatives with the combi-plan (out of 20-30) and 2 with the Jobo (out of 5-10). Hopefully that's just learning curve on the Jobo side of things, not inherent flaws.
The Jobo also gives uneven development where the reel holds the film. I have to crop a little more off the edges than I did on the combi-plan.
I'm still not going to switch back, because the motorized agitation and easy chemistry changes using the lift make developing much less onerous. There's no point shooting film if I never get around to developing it.