The one good thing about TRED 4x4 is they have a lifetime warranty vs a 2 year warranty from MaxTrax. Here's a side by side comparison.
I found them on Amazon. At half the price of MaxTrax they seem appealing, until you realize that's the same pricepoint as the Shittybilt ramps and those things suck. The MaxTrax rep says the Treds are made of PVC plastic, which is exactly what the (shattered) Shittybilt ramp I saw appeared to be made of.
OP, I'd get the MaxTrax. Or wait until more guys have bought the Treds and they get a better rep.
I did not know about the lifetime warranty. That and I have found the tred4x4 for 150 over maxtrax 299.
Buy it, break it, and get it replaced for free. MaxTrax are better in my opinion. If you're not planning on using them very much the TRED's will work just fine.
My concern would be having them break when you need them - I'm a buy once cry once sort of fellow, and IME the more recovery options you carry the more you're likely to do something that'll make you need them.
If you get the Treds, take them out and TRY to break to them. You're out nothing if it works, and if you can't break them then you know you can trust them. Post up your results!
Local expedition outfitter is having a sale on the Treds. Not sure how the price compares elsewhere on-line, but just saw them on here today.
TRED Total Recovery Extraction Device
The one good thing about TRED 4x4 is they have a lifetime warranty vs a 2 year warranty from MaxTrax. Here's a side by side comparison.