try the free demo car, & if you like it pick one model (other than the 918, of the ones i have its the only one i wouldnt recommend, im not sure why but its an absolute chore at low speeds), give it a try. personally i think $6 is bit too pricey but if thats working for him, it doesnt justify robbing him for the cars hes providing. ive bought several, i can say for sure the guy actually cares, is a porsche fanatic, updates the mods etc. at least one model was just updated today in fact, so its not just as needed fixes, if he gets new data etc, he'll use that.
ive already debated the ethics of it at length over on the AC board so count me out of that one. but yeah, theres a demo car for a reason & theyre not nonsense physics & data where youll just be out six bucks if you buy one. plus as said the models are excellent.