I bought a dual tank setup from him (along w/ extract, hops and yeast.)
Good presale communication - usually takes one day to respond. Keg kits actually ship from here:
http://www.markpowers-and-company.com/ Shipped right away. Corny kegs were in good shape, clean but missing one o-ring. They actually shipped a CO2 tank by accident (didn't order it, nor did they bill) - am still waiting for o-ring replacement and shipping instructions for tank return... (got replacement o-rings elsewhere!) I rent a 20# tank from my local AirGas (welding supply.)
Regulator setup is of good quality. Sec regulator is a 0-100psi - a little high - I'm in process of swapping gauge.
Product works great - good quality hoses, basic picnic taps work for me. I would recommend him.