Dog Ramp Comparison

the information given is my opinion only.
i looked into dog ramps as my back is getting too bad to lift my big dogs into the van in the event something happens that they aren't able to jump in themselves and also due to the fact i don't like my big dogs jumping in and out as i have had them slip at times and i just don't feel that it is good for their joints, especially as they are getting older.
1. at first i thought that i would like a "telescoping ramp" but as i looked into it more i didn't like the look of the aluminum which could dent and get sharp edges. in the reviews on them there were complaints that "the sandpaper like walkway" would get holes poked thru it from the dogs toenails and wasn't very rugged. at the price of around $140.00 i decided that it wasn't built to the quality that i expected at that price.
as i may be in places with rain or snow, i wanted a rugged all terrain ramp.
the telescoping ramp only weighs about 13 pounds which is great, but the features and what i had read in the reviews made me worry that it wouldn't last with my big dogs, me tossing it in and out of the van that could cause small dings that i was afraid then it wouldn't telescope right or if i left it set up when at dog shows or camping and it getting weather. review complaints of the legs falling off and the problem that many stated about the "sandpaper like finish" (it looked like rubber matting in the picture, but i guess not). trying this out made me decide that even though this was lighter that it wouldn't be the right one for me
this is rated to hold up to 400 pounds. telescoping ramp;
http//www.discountramps.com/petImages/deluxe-telescoping-ramp-4.jpg
2. so my next choice was just an all plastic one which was $40.00 less thru costco. (most other places that sells ramps carried this ramp also) it weighs around 18 pounds which carries easy with the built in handles on each side. the reviews said that people pinch their fingers closing it and i can't figure out how they do that unless they are picking it straight up in the middle where it hinges. i have had no problem with pinched fingers, if folds down as small as any others i looked at, is easy to handle, set up and take down. i love that it is molded solid so the rampway is firm and steady under the dogs feet. the footing is good and doesn't slip around when in use. it is solid even when up on my side door van step. i love that this is weatherproof and if left outside no harm will come to it from rain or snow (it can even be used in swimming pools and has optional legs for that application).
i'm sold on this one and it's the keeper! this is rated to hold up to 500 pounds; http://www.discountramps.com/petImages/petstep.jpg
3. there is one that looks much like the one i got and is priced around $70.00---but it's not of the same quality. many complaints about it tipping, the surface and enough bad reviews that i didn't even try this one out even though it was cheaper. it weighs 10 pounds and is rated to hold 200 pounds. http//www.discountramps.com/petImages/solvit-folding-dog-ramp-2.jpg
of course this is all my personal opinion on these ramps and it's each individual choice to see what they like best.