I have a 2015 26BHS. After 1,000 miles, I noticed excessive inside tread wear and a slight camber angle difference at the bottom of the tire between the two rear tires - dual axle). Looks to be a defect I didn't notice when I took delivery. I took it to Camping World, where I purchased it two months earlier and they confirmed a bent axle. After two more months I finally got the trailer back (rant about that a different time). I decided to replace the tire on my own as I just wanted the trailer back. I had purchased Trailer Aid Plus in case I ever needed to change one out.
This is my experience using the ramp.
I loosened the lug nuts, placed the Tire Aid and pull the trailer up on to the ramp. You really need someone back there to tell you how far to go. I could see the ramp on the drivers side as I was angled that way a little, but the passenger side I wouldn't have been able to see anything. I could not 'feel' the trailer rolling into hump of the ramp. You want to get the axle right in the middle of the hump for stability. After getting up on the ramp the tire I was going to change was still touching the ground.
I was still able to pull the wheel off without much trouble even with it touching the ground. I went and had a new Maxxis M8008 ST (The 26BHS came with Rainer, but I could find them online to purchase. Maxxis seemed like a good replacement after reading through reviews). When I came back I could not get the new tire on as the axle was not high enough. I keep a small travel folding shovel and I dug down ~ 2" and was able to get the tire on.
I tightened down the lugs nuts, rolled back off the ramp and finished tightening down the lug nuts and it looks like I'm good to go.
So overall the ramp worked, but I was lucky to be sitting on gravel where I could dig out under the tire a little bit. If it was on a solid surface, I don't think it would have raised the other tire enough to get a new one on (the gravel was compacted and didn't give much). Perhaps a small 1-1.5" plywood strip may have done the trick under the ramp (or the plastic level squares?). Or if you end up on a soft surface and have a shovel you can dig down like I could this time. You could also ride up the ramp a little to get on a ramp tip to get you a little extra lift, but I'd definitely make sure the TV is attached and wheel chucks are locked in tight to prevent movement.
There is a non 'plus' version that doesn't have as much height. I bought this version to avoid that problem, but it looks like getting the height you need could still be an issue.