Got some Jebao pumps a couple of weeks ago, for the price you just can't go wrong.....unless if it catches on fire but I highly doubt it. I would recommend them to anyone who is looking for an inexpensive alternative to the over priced units.
Also purchased a wave box, I give it a 3 out of 5 due to the bottom isn't exactly stable while the box is a inch awl, however the pump is still strong enough to push a good wave in the 300.