I've got the OEM Panniers for the Tenere, well at least until I get them on Ebay!
They are stronger than they look, and can take a couple of falls, but the mounting just isn't upto the job. They mount at the top and at one point at the bottom front, leaving the lower rear part of the pannier kinda flapping!
They are a bit small for anything serious, they say 30l but the 29l Zega bag only just fits inside, and thats with a squeeze.
I'm just waiting delivery of the new Zega Pro stuff from TT, it's been despatched but it's not arrived yet......
on balance, if you want to tour, as in B&B or Hotel then they are a good buy, waterproof and they do take a good beating. If you are off over the desert then something with better mounting is advisable.
The locking mechanism is overly complicated too, not easy to repair if it should fill up with sand/mud.
I had mine replaced on warrenty when they developed a stress fracture along the top mount, maybe something to do with a caoupl of off-road falls
I have two new ones that I'm selling along with the mount kit. (if you are intersted PM me)