I have a Sartori, had it about 18 months. Not over impressed with the build quality. You use the front wheel support as a carrying handle, but it is not all that secure. Some of the plastic bits at the hinges of the trainer are fairly stressed and cracked in under 6 months of fairly light use, this did not effect it operationally but still, its not impressive. When it arrived, with the resistance cable assembled and ready to roll it would not go into the full range of resistance levels, as the control cable inner seemed just a bit too short. I had to screw everything really really tight before it would go into the last resistance, and only just! The lever to change resistance levels is made entirely of plastic and I am careful to give its lever a lot of support when changing levels, as it looks somewhat fragile and likely to crack like the other plastic bits. I dont want the hassle of trying to get a replacement from a company that sends out kit that won't even go into the full range of resistance without a fight!
Oh, also if you want to change wheel sizes (700c, 26", or just different depths of tyres) you have to take the whole thing apart and fit alternative bits.
The resistance levels/magnet system is excellent though.
I also own a Kurt Kenetic Road Machine trainer – very good build, changing wheel size is simple and does not involve taking the whole thing apart and finding the spare bits. Solid well made construction but downside is automatic resistance levels. In an ideal world, I would move the resistance ability of the Sartori to the structure of the Road Machine.