There are private web-based car 'clubs' or forums for many cars &/or brands. Owners swap impressions, problems, solutions, etc. Obviously these sites tend to attract more satisfied owners, but every model has its (possible) warts
Now days the difference between a average reliability and top marks for reliability wouldn't factor much into my buying decision. Perhaps 30 or 40 years ago when cars were less reliable and I needed to get work everyday I'd place a much higher premium.