Yeah better than the dealer . They will most likely won't warranty it because is aftermarket springs even it is frpp and you installed it. Plus you don't want the techs messing around with your car. Something will get damaged/scratched.
You can go to Walmart and buy the tool in the link I posted and check for code and reset your height sensor. It will give you 1 free manufacturer to choose so you will be able to diagnose your car completely with bunch of extras. Non of that generic code crap. It is a very good tool.
This how mine is with the car on the ground. Picture was taken from behind the exhaust on driver side.
Check if the harness on the rear shocks did not get pinched on the 18mm shock mount bolt. I managed to do that once and had to fix my wires.