I've been very tempted by that Mustang myself... It'll be a far step up from the stock standard Evo you get lumbered with until you purchase another car...
Pros
Free to start racing
free tracks
great force feedback
improved graphics over rF1
fixed set up online events for which you compete for cash prizes
Some of the racing can be a blast, even in a Evo
Some great cars to buy, including the Dodge Viper and McLaren MP4-12C GT3
Cons
the ratio between miles and $$ to buy cars seems way off, but most cars are under the $5 mark, so it's no iRacing
their website can be very glitchy which makes it hard to get the free tracks
There can be a lot of crashers during the online events
last time I tried set ups are very non responsive, as in the changes don't really feel like they are made
the cash prizes are usually just enough to buy another car, and with the amount of other people taking part it makes it a hard win..
It's still very early days for the project... It's got a lot of promise, and in comparison to some of the other games out there it has stolen the march on a part of the market that could be made their own if they do things right...
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"The motivation is high, I enjoy taking the smile off other peoples faces"
Mark Webber