Solo, Congrats on a great DIY accomplishment! We've had HWH kickdown jacks with central pumps and manual control on a 24-ft and a 31-ft Class C. Both Ford based. From this I can offer:
1. The hydraulics are very reliable. I haven't opened the sealed system or even added fluid.
2. The Longer the Wheelbase the better you'll like Jacks. With a short coach, you get some Rear lift while raising the Front.
3. You get some unwanted Side lift too, raising the Left when wanting to raise the Right, for example. This is because the C chassis is so narrow.
4. Kick-Down Jacks have been a PAIN!!! On both C's they like to extend before getting fully vertical. If a Direct-Acting kit would work, I'd be interested. I think I'd pass on Kick-Down and level with Blocks.
5. Jacks level well but don't add all that much to stability. They lift part of the coach weight and leave a lot on the tires and suspension. Big Sway Bars added more stability for us than deploying jacks did. Only speculation, but I'd imagine Direct-Acting jacks would be stiffer than Kick-Down.
6. So, I'm not a major fan. That said, being able to pull into a campsite in the pouring rain and level without even getting out is, well, Priceless.