I have had a TJM on my 80 for about 3 years.
Pros:
Easily installed
Looks like a factory bumper
Comes with pivots on left and right sides.
Tire carrier can be ordered for left or right (or both)
Supports a 35" tire (but is designed for a 33)
Can be used with most trailer hitches
Cons:
Poor quality powdercoating (mine started cracking and peeling within 2 years)
35" tire hangs to low (33 would be ok)
Not as good of a departure angle as the Slee or Hanna bumpers
Wings are not strong enough to withstand serious rock bashing.
The TJM is a decent bumper for moderate off-road use (other than the crappy powdercoating job), but is not the best choice if you plan to do any serious rock crawling. The tire carrier works fine as long as you running a 33" or smaller tire. A 35" tire hangs down too low, causing the tire to hit when coming off steep rock ledges and if you're not careful, it can force the tire into the rear window.
I bought the TJM because I had a 40% discount coupon from a TLCA event raffle which brought it's cost down to less than half the cost of a Slee or Hanna unit. If I had it to do over, I would probably try to trade the certificate for something else and buy one from Christo.
Hope that helps.
Bob