I think it was decent, but it feels a bit unfinished(tracks and cars don't have their preview images yet, there's not that much content) and the physics are imho a tad soft and floaty, at least on the free Mitsu. I would've tried the 1M, but you have to buy credits for at least 5$ so I couldn't be bothered. It looks fine though, and the UI feels solid and clean, much better than either rFactor or SimBin's titles. The car list is pretty nice though, even if it doesn't have much actual race cars, and they add more cars constantly, but I miss some bigger(more famous) European tracks. Don't know about the online/TT component though, but for me there wasn't enough yet to keep me playing and I was slightly disappointed in the physics department.
I've been playing a lot of GT Legends lately(probably one of my favorite sim titles as it's the one that got me into the genre), but I keep ragequitting because of my Momo; it's so damn heavy yet mushy and sluggish as hell. My non-FFB Formula Feedback Wheel was so much better in it's day. I wish I had money for at least a used G25, but no...
EDIT:
I tried the DiRT Showdown demo and uh...it wasn't very good. I loved the first DiRT, I very much liked the second, third was good, but a bit of disappointment and Showdown felt pretty crap compared to any of the previous ones.