You will love this little laser, I own one and they are great fun, no power probelsm or mode hopping, and its bright ( especially if you can get 3.6V unprotected cells for it )its nice and sturdy too, great for carrying around with you and showing off to your friends.
Hope you enjoy it.
Remember you need to fiz the PCB when you get it, just look down the barrel and you will see the PCB with the switch on, remove the foam thats under it and replace it with some folded paper.
Diachi