Milking a Goat by Hand

Full Moon,Do you have any experience with this hand milker?  If so, how fast can it milk a goat out (1/2 gallon) and does it take a good amount of hand strength?  (reminds me of those grip strength exercise tools - will I get forearms like Popeye?)
We have a La Mancha that has small teats and is difficult to milk out and have been thinking of trading her out of the herd but if this milker could work - we might keep her because she is a sweetheart goat.  Thanks for the tip.