The best thing about register 4 less is that it has almost all domain extensions, like.com etc., which makes managing them easier for customers who are not technical people or just don't have time to do so manually! There's nothing I dislike at this point in my experience with their services because they provide everything needed by me as an owner/customer under one roof!! Great website design too.
Very intuitive user interface; no need really since you can always contact customer support if any questions arise while using your service (like billing issues).