I love mine. They have a feature that the manual jacks do not. You can NOT rack the frame by uneven pressure like the manuals. They maintain equal pressure automatically.
This can be really nice if you boondock off of pavement concrete etc.
With my old manuals I would get it all set up to where it was solid and none of my doors were sticking, and a few days later the TT would have settled unevenly. The doors would start sticking meaning the frame was racked. I would have to reset it up again.. If it should rain, it was worse.
Now with the elec. jacks, the TT still settles, but evenly. A quick touch on the buttons tightens it right up.