I've had two 5's, an '05 one that I bought in December '04, and an '11 one that I've had since June ish.
Most of my riding is done around Kinver which is a big lump of sandstone and the soil conditions are a pretty abrasive. I'm not the best when it comes to cleaning bikes in the winter either, a quick rinse with a garden hose and a bit of lube on the chain is as much as I'm prepared to do on a dark evening.
When I got the first one, it was my only bike and got ridden 2 - 4 times per week for at least a couple of hours at a time. Thats around 40-80 miles per week. In that time the bearings never had any play in them so I left them alone, but it did get through 3 sets of shock bushes.
It cracked on the weld between the seat tube and the BB shell about 2 weeks before the warranty ran out and was repaired FOC by Orange. They re-welded the cracked section and it was returned with a shiny new coat of paint and new pivot hardware.
Following that it was fine until April (ish) this year, the frame was actualy ridden for longer in its repaired state than before hand. It was at this point that I spotted a big open crack in the opposite side of the repaired weld that extended into the downtube, another crack through one of the drain holes at the drop out end of the swing arm and the start of another small one in the drive side of the swingarm above where it clears the chainset.
I wouldn't be surprised if it had covered a good 5 figure mileage, all with 15st of fat bloke sat on top of it, so I didn't feel like it really owed me much.
I called Orange after finding the first crack to see if they had an old front triangle they'd be willing to part with, and on the off chance that they might be interested in looking at the photos. They hadn't got anything that would fit but did sort me out with a crash replacment discount on a new one.
I hope it lasts as long as the 1st 
)
, I have bearings for the orange 5 and sub 5 frames. I've been testing them for about 4 months now. 
