It helps to know what model rim you are talking about... Alex makes everything from crap to really good... they actually make rims for quite a few big manufacturers, including Salsa with their very highly rated Delgado rims. The build is ultimately whats most important though... I've seen a lot of really good hand built Alex's and a lot of really ****ty machine built Alex's (the ones on Specialized and Bianchis come to mind).