I have a costume pop top on my HHR I love it they have a warranty have 6 years that is alot long then GM's so if you get it professionally installed your good

 

I have one on my 2010 Malibu LTZ. The dealer had it installed when I bought the car in March. It comes with a full warranty, and I have not had a single issue with it. It looks great. Ask your dealer who they use.