A word of advice with the escalera:
Practice it with a lighter load a few times and work up to a heavy load. I see all the time people complain about how the load wants to “yank away from you” when you engage the motor and the “feet” engage on the steps. This is definitely a thing you need to get used to. The whole trick is to find the balancing point when the feet grab the steps. Slow and steady wins the race.
Once you practice, and get the hang of things, the escalera is worth it’s weight in gold. It’s an amazing unit, and works equally well going up stairs as well as going down.
People recommend the taller unit (the 66 I think), and for all intents and purposes, it’s the superior unit, since you can break load backs easier, and I feel like it’s be easier to balance, HOWEVER, these escalera handle like lead bricks, so if you have to make a turn on a landing in a tight area, you might want to go for the shorter model.