nice looking, smooth working game but - very little tactics or challenge in game play (unless you made mistake in leveling then it can be hopeless), unbalanced classes and in the end just tedious clicking
Upgrades are boring and counterproductive, car either goes full speed or decelerates in no time and spins on spot, there is no real progress or change past first track. Well it takes your keypress and displays car images so i guess it qualifies as driving game nowadays.
For people disliking the downtime: you can play another character or build your character so it has plenty of hp and power (it takes 20 min to full no matter how much HP you have). Such character has less damage but has more standing power for dungeons. This is one of more forgiving games and waiting more or less is your own choice.