Thanks styfle. Do you want to try it for the experience of making a circuit, or for the end result? Because, if it's the latter, you should go for the PocketSolutions charger. It's cheaper and more effective than the mintyboost.
But definitely not as cool
If you know how to weld, soldering will be easier. Lower melting points, smaller scales, and no blinding light (just a smoky smell that you grow to actually appreciate). As long as you don't have jittery hands, you're gold!