Very happy with my Pratt MicroBeacon. It's easy to use, and is loud enough to be heard if you get near where the rocket landed. Can be used in any sized rocket over BT-20, beeps and flashes as soon as you put in the battery. The warbling tone is very distinctive, we call 'em rocketeer annoyance devices if they are going off in the prep area.
Can't say I've ever seen one of the WeeBee's, it seems a little more complex (lift off detection, low light sensor,flash or beep, metal casing, etc) and at 6 times the price, it doesn't seem to be in the same category as the MicroBeacon.
kj