tested out a few of the end mills: 1/4" 2 flute, and 1/2" 4 flute.
they seem to be generally good bit, very good for how cheap they are. the side wall finish isnt so hot on heavy cuts (not helped by my small machine), but its acceptable on finish cuts. the "bottom" finish is somewhat amazing actually. the 1/4" is like glass. you see the swirls, but you cant feel them. this is even better than the name brand hss and m42 bits ive tried. coolant also helps improve the finish substantially.
for the price - $3.50 for the 1/4" and $7 for the 1/2", id say these are great for non finish critical aluminium jobs.
ill try to make a vido over the weekend cutting somethign interesting with them.