They are a great daily driver i chose not use mine because the more your on the road the more chances someone will jump out and bump you . As for problems nothing to dramatic , but depends on the car you buy some older year models may need more TLC than others it varies on the buy , mine only needs minor things like left air vent but its to be expected . You can spend what you want on mods but i rekon Nissan has a very tight package in standard form and mucking around with it only puts you in hi risk in damaging it and that goes with any car you buy .Manufacturers do things for a reason tamper with it it can go both ways its a gamble .