Pro Minimalistic & Simple
Some other solutions are like using a chainsaw as a butterknife, yeah it goes through the butter, but then it also goes through your leg, and you really wish you would have just grabbed the stick of butter and smeared it on your bread with your hands.
Cower is the butterknife. It's easier than maintaining everything by hand but also forces you to pay attention (which you need to do anyway)
Con Does not support the modern RPC interface
cower was never updated to take advantage of the multiinfo support introduced in https://bugs.archlinux.org/task/17583 and therefore puts a heavy burden on the AUR server in addition to sometimes suffering timeouts. Users of cower are heavily encouraged to migrate to its successor, auracle (created by the cower developer as the next generation of cower).