I am considering the purchase of a used 2014 or 2015 Legacy with the H4 engine. Both have a good service history, and both have around 130,000 miles. Can anyone give me advice on their reliability? Are these generally trouble-free? Are there any specific problems these cars are prone to that I should keep a watch out for? I already have a 2013 Impreza with the 2.0L FB20 engine and have been very pleased with it. However, I'm not up-to-speed on these Legacy models or their drivetrains and would like some advice.