He's had it a while now. I'd recon on 12 to 18 months but the paint and sticker quality was bad from new. The issue with draw welds seperating was on a different model to be fair so your box may not suffer from that issue. His hasn't but one of the other lads has and subsequently had a replacement under warranty.

My MAC dealer has assured me that the higher end boxes (Tech 2000 or what ever thay call it) are a lot better built but he never has one on his van for me to look at.

I have a Snap On KRL and KRA series box and the KRL (high end) quality is fairly noticable from the KRA (low end).

Another thing I have issues with is MAC's lock and roll system with those clip in things at the back of the runners. My KRL uses the normal Snap On type lock and roll in the handle but my KRA had both the MAC and Snap On type. I took all the drawers out and binned the little rubber locks on the back of every runner.