Prelude: I have no relation with Wilson FX. My opinions with the system are based on evaluations I conducted as we made an effort to rebuild our launch system for our club.
My recommendation: go buy one. Dan Fox (an industrial/electrical engineer by profession) has worked with Brad to design a tremendously capable system that is aimed at safety, reliability, and expandability.
The boxes are built around microcontrollers which control each pad based on a data stream that is multiplexed over a standard 3-wire connector. As a result, the boxes can be daisy-chained, branched, or any other means you can think of to get cables to the pad. This makes range setup a breeze. Dan is also nearly finished with a wire-replacement transceiver for the system -- rather than having a single pad wireless box, the same control packet protocol is sent wirelessly, making an n-pad away cell setup effortless, and extremely safe; if packets are lost or dropped or scrambled, the wireless unit shuts the bank down until the interference is solved. The relay boxes (one and eight pad configurations) can be field programmed, if necessary, to reconfigure the range.
The boxes are waterproof; one of QCRS's 8-pad boxes sat underwater for three months (in a storage tote, weighed down by pad cables), and all that needed to be replaced was the continuity check pushbuttons. A prototype system made it through a microburst in Florida, floating around on soggy sod for two hours without incident.
The relay connections are bladed directly into the pad output cables, to prevent arcing/bridging. All relay outputs are protected with diodes.
The digitally muxed system enables various sequences of tones to allow human evaluation of system state; armed banks remain quiet until a pad on that bank is armed, warning bystanders of an impending launch. If the bank is armed, and personnel remain at the pad, pushing any of the continuity check buttons at the pad disarms the pad box so you can yell at the LCO safely. Continuity and arming status is reported at the main controller. The main controller also includes a fill/dump switch for hybrid operation.
The default operation for the main pad box does not allow multiple banks to be armed simultaneously, to prevent launching a rack while loading another. The single-pad master control unit can be field reprogrammed to launch multiple racks simultaneously for Midwest Power-style drag racing.
All systems are interchangeable and expandable; a single pad box purchased for personal use can be used as an away cell box on a multi-pad system, and will still retain its individual box ID, even after being field-reprogrammed to function in the multi pad layout.
The pad beepers are LOUD. The buttons are solid. The interface layout is natural and makes it hard to screw up on the range; if Tim can make it work at the MWP night launch, you KNOW it's got to be easy to operate. And the system is priced approximately on par with what it would cost to build from scratch.
The multi-pad MCU can operate up to 64 pads per system (8 banks, 8 pads each), which is more than enough capacity for most any club. If you need 128 pads, add another MCU, it's the least expensive box!
For the amount of R&D and coding that has gone into each box, the system pricing is a steal. HIGHLY recommended.