I have about a dozen hunts in now using sladder. I took it out of the box, put it in my pack and went hunting. No practice, but did watch the videos. I didn't take any other climbing method so I could truly give it a try. Its awesome.
It was as easy as the videos show and truly works great. Used on trees from small basketball size to ones I couldn't reach my arms around. It is very stable and side kick-out is pretty much a non-issue.
I tried to do what he shows in the video, pointing toes up, putting heal into step and sliding toes down tree to push sladder away from tree, but I couldn't. I couldn't get ankle bent up far enough to get my heal close enough to catch the rung. I found it much easier and quieter to put my foot just above the rung against tree and then push out sladder with the foot that you are currently standing on. This brings the rung out to my heal, instead of bending my ankle to catch the rung and then pull it out by sliding toes straight. Even works well when close to the top of sladder. Should work easy for any size boot since you can pull a lot further from the tree with you whole leg.
The daisy's are too short unless all you are climbing are telephone pole size trees. I just used diy daisy's (not with the wide loop that comes with sladder) that I took off some hawk helium sticks, removed the stock ones from sladder, attached diy to sladder, then stock daisy's attached to diy daisy's so the wider loops are there for the hooks.
I could reach 7'2" so I followed the suggestion to get the taller one. I was worried the extra length would get in the way and be a hassle. It actually worked out better than I thought. The extra length gives just enough slack to really toss it up high on the tree when hooking as well as give a little slack to more easily get your foot in the first rung stepping out of foot loops.
This will be how I get into tree's for the foreseeable future (unless a huge trunked tree where SRT is only option or SRT preset) until something else comes along that is better than the pros listed below. I have used single step sticks, double step sticks, wild edge steps, SRT, DRT, 2TC, aiders, knaider, swaiders, etc...
Pros:
*Lightweight
*Quiet
*Extremely easy to pack/carry
*Fairly quick to get up tree
*Unlimited height
Cons:
*stock daisy's are too short - easy fix
*The foot loops may be too small for very large boots. Work great for my boot size (11EE), but maybe ~13+ may be close