Love them to death. Best routing software ever.
I've had a fireface 800 since '06 and it hasn't let me down once with any laptop or desktop rig I've owned.
Converters are good, preamps mediocre
I don't think the preamps are dogshit; just kind of whatever. They're functional and don't sound bad by any means. I have Lavry converters and an A-Designs MP2A and while those are clearly better; I don't think it's worth the price increase vs quality difference.