Clearly this systems combines the best of both the digital slot racing and RC worlds. Cars can be driven on a scale sized track (not huge like a typical RC track), can change lanes, are driven much like slot cars with only throttle inputs needed unless lane changes are made or to drive back on the course if you shoot a corner into the weeds.
He now has taken his system to the commercial level and has just announced his new website store where he sells the cars and the controllers. The prices are great. A car and radio server lit sells for $117 plus $5.50 shipping from the UK. Added expense are two AAA lithium ion batteries for each car plus a charger. I would think that a charger plus a couple of spare batteries for each car would be in order.
I have lifted this pic from Wes' website I trust he doesn't mind since I am shilling his web store.

Here is a link to his website. http://www.magracing.co.uk/index.html
I am really high on this system and hope to convert one of my many slot tracks over to it.