Ryan, can't remember which system I got as it was a few years back, but I can dig than info up later.
It was one of their kits, basically I supplied the PVC accumulators and a wood frame to hold all the bits.

It was a perfect choice for my veneering needs since I had a larger compressor already and did not have a vacuum pump. I like how it shuts off until the vacuum drops below a set point whereas a pump will be running constantly.

It is as fast or faster at drawing down a specific volume than the small pumps I'm familiar with so it seems it would do well for clamping.

My compressor is a 5HP single stage (60 gallon upright). The air draw is about the same as what the compressor can put out at full charge, but since it only runs for about 1 minute to draw down a large bag, it is not a concern for me.

Best things:
Compact, light, zero maintenance, dead quiet (when not runningšŸ™‚), works for the intended jobĀ 

Worst things:
Need to drag over an air hose, kinda loud when operating, wouldn't want to use for continuous operation due to the work being done by the compressor.

Just checked the VS web site. Closest thing is the "V4", basically the kit of the venturi, solenoids/valves, gauge, brass fittings and hoses. It was an earlier version that I bought, maybe around $200 about 5 years ago.