if you do enjoy building cars and i mean REALLY building them, this will be great to play
if you want to build a car you will need to get all the suspension, brakes, rims, correct tyres.. then you will be moving to engine which again has loads of parts - blocks/pistons/cranks/oil pans/turbos/tuning parts and all the mixture ratios etc..
same with body all of the parts are removable - obviously depends on how the modder has made the mod

original cars are rubbish

and the game was made in 2003 with little to no support after release from the devs so crashes/bugs etc are there