50mW green laser can't pop a balloon, if it's without lenses or if u are not using magnifying glass... About ledshoppe i can't tell anything, haven't bought from it, but how other people say, it is worth for such a low price to risk... let's say 25$ for 50mw blue/violet is damn cheap, and i dont believe that it really has 50mw or if it will run without burning itself... If you want a cheap burner, buy 200mW new style/adjustable red laser from O-like, or if u want, from rayfoss... Recommend it ! About cheap green lasers, that could burn, well... buy from DX 200mw module (it will have about 100-150mW) for 50$ and any simple pen style laser, then simply remove the module from old laser, and insert the new one... No hard work. There's also a tutorial made by styropyro in youtube... Your choice, and sorry for bad english.