my 12S 5300ma spyders have lasted 2 years. they are finally beginning to fade now. i also didnt take as good of care of them as i should have, so they probably would have lasted longer. i can still use the packs to test with, just hover and diagnose things, but i cant 3D the crap out of them anymore......
pulse packs are great, TP are great, spyders are great, you have many options!