In a market growing with several tiny SUV options, the Mazda CX-3 is a dapper, well-designed choice. Unlike competitors that appear tall, narrow, and not quite grown-up (Chevrolet Trax, we're looking at you), the CX-3 is a fully formed vehicle. Driving it puts a smile on your face. It's one of the more appealing entries in a new class of wee SUVs, with agile handling and good fuel economy. But it's snug inside. So snug, in fact, that you might physically outgrow the CX-3 before you're ready for your next car.