Mine was installed by the company that does SMB-West's work and it is an Avital. It is simply a brand of Directed Electronics that also makes Clifford, Hornet, Viper etc. I am under the impression that all these inexpensive ones are similar. It depends on upgradability and what other options one wants that affects the price. i.e. 2 way tracking, electronic tilt if the van is lifted by a jack or tow truck, remote start etc.
'05 Ford V-10 4x4 SMB "50" White
'00 Jeep Cherokee 4x4 Highly Modified
'04 Jeep Grand Cherokee- wife won't let me modify it. :-(
Does anyone really read this stuff other than surfgeek?