I bought both sets. I only planned to by the SAE set, but picked up the metric as well. Sometimes it's good to have 2 wrenches.
I think they're a good deal at only $80/set. They don't go on sale very often, and although at a deeper discount previously, they last went on sale in August.
I don't care about the "non-slip" feature of the more expensive option and on sale these are very comparable to competitors like Tekton and Capri.
I haven't used them yet, but so far no complaints. Look and feel well built.