Class A motorhomes offer the most luxurious RVs available. As a motorhome, they are self driving, and the Class A sets them apart with an exceptionally strong, heavy-duty frame that can support more weight than any other type of RV - meaning the best fit and finishes available (real tile showers, real wood cabinets, etc.).
They are roomy, spacious, and have plenty of storage. Downsides are their upfront cost and the fact that they will give you the worst miles per gallon of any type of RV.