Any used car can be great. Any used car can be awful.
The Solstice and Sky have a reputation as not the most reliable cars ever made. But the idea of a 12 year old car needing repair every month is something that passes belief. The mere fact of age conveys nothing about condition.
A Solstice, today, would be in general be an awful first car for somebody inexperienced with cars in general, because that person wouldn't know what to look for on the car or what makes a good one good or a bad one bad.
Mileage by itself does not convey a true report of condition, as well. many Solstices have low miles. I looked at four with under 25k miles. Three were not worth the asking price at all. Consider this: I could ruin a car in its first ten miles. I also own a car built in 1969 that has well over 300K miles. The car had to run to make 300,000 miles.
Driving and working on a Sly 2008 Solstice GXP 5spd 260/260, and the worst-built 2012 LS3 Camaro 1SS to escape from Oshawa.
Gone but not forgotten:
2007 Solstice GXP 5 speed 290/340
Stored and needing to part ways with a 1970 Skylark Custom convertible I have owned since 1989 and turned into a GS455 clone. 462 with 7/8 primary headers, adjustable roller rockers, TA Performance Stage 1 aluminum heads, auto, Chevy 12 bolt, 3.31:1. Sadly a project car now but a driver from '89 to '06.