Bad-ish, especially for XC700 ata and other models with loads of fancy adjustments, basic models were fine 🙂 The silver coating on uppers flaking, dropping on travel due to some problems with the dual air chamber spring. Look for some reviews on the internet, You'll find some pics as well. They are very very cheap now at Jenson but it's for a reason 🙂 However some are sound and my 2007 XC500 apart from minimal play on bushings form new wasn't that bad and just kept on working. Might be just a bit hit and miss, You might be lucky and get a sound example 😉
2010 44's I got for my mate work fine and seem very solid, but on the heavy side + 3 year warranty as a bonus.