FWIW their client has gotten WAY better in the past year or so. It at least now actively monitors folders where before you had to literally prompt it every time you wanted it to upload new items.
What they are lacking is priority option and/time option. I only want it to upload items between certain times of the day as if it's uploading at full speed (I only have 1.5Mbps) then all my internet access sucks (thanks DSL!)