Had a 29er On-One Scandal for about a year. Use it as my ride out the drive and see where I get bike and so it does a mixture of tarmac, bridleway, forestry singletrack and Dalby red route. Started with a rigid fork – salsa cro moto not the carbon On-one – but too much for my tired old bones to cope with when going down rutted bridleway at 35kph. Bought an RST M29 from On-one and it has been fit and forget, although probably just as well as RST seem to have distributors everywhere but here and I am damned if I know who I would go to for service etc. I guess when it breaks I raid the piggy bank and get a Reba.
I went for the geared Scandal 29er for a combination of reasons – the steel ones were out of stock and my impatience outweighed the cost differential, I am too old/unfit for Singlespeeding so was happy to go geared (although now they seem to concentrate on selling frames with Brant's do it all dropouts more suited to your wish list), and I am 6'4" and wanted a bike that would fit in between the hardcore hardtail and the winter roadbike.
As such it has been great, and if I had to stick with only one bike this would be it.