Very well built and very pleasurable indeed.These toys are exactly what I was looking for! The small is small enough to help train your backside to begging back door play. And there are noticeable size differences so take it slow if your a beginner!! The suction cup doesn’t work. I bought this knowing that the “suction cup” is nothing more then a wider base so your toy doesn’t get stuck up inside you (causing for a very awkward trip to the ER) however these toys are very easy to clean and fun to play with rather you be alone or with a partner.Size was great and fit the purpose of the purchase however the suction cups do not hold well regardless of what surface we try them on.I enjoyed these. They were what I was looking for. There is a noticeable different between each end and between each other. Unfortunately, they like to slip right on out but that was to be expected. That's still the reason for the loss of a star.I believe they do suction to a bathtub, etc. Didn't try them that way.to much curveIt's a bit firmer than the best platinum silicone products but sized as advertised. Suction cup did work on non-porous surfaces but is not shaped or sized for a strong suction hold.I'm satisfied with my purchase. (I'll spare the reader any of the seedy details, I'll say 'They get the job done' and leave it at that.) Also, they clean nicely with a Clorox wipe.Just right.Hits the spot daily use.Guys give this a try you will be hooked and always want your hole filled.