The premium Infiniti brand is a mixed bag of some stylish and some long-in-the-tooth models. Fit and finish is usually very good, and the powertrains are typically strong. But it is hard to nail down just what Infiniti embodies as a brand, because test performance, reliability, and owner satisfaction vary widely across the portfolio. Infotainment systems are behind the times. At least the vehicles come with a wealth of standard safety features.