We traded a Solstice GXP in on a Wrangler.
IMO the Solstice looks cool and thats about it.
In 10,000 miles we had these problems:
Passenger outside door handle broke, common problem.
Console cup holder broke, common problem.
Water pump went out, thankfully there is a 60k powertrain warrenty. It is a gear driven pump on the back of the engine. About $1000 to replace.
Interior does not wear well.
Top does not seal well, the Jeep top seals better.
Tires are very expensive.
Uses premium fuel.
The owners manual "recommends" synthetic oil.
Not much DIY maintenence unless you have access to a lift.
There is no spare tire or jack. The car comes with a can of fix-a-flat. (no kidding)
We would not own another one.