I looked around me because of my back pain and spinal problems for a way how I almost casually, sitting in my case at the desk could do something to build up my muscles. Here I found the exercise ball and landed after some research on the internet at the Pezziprodukten. My former physiotherapist said that one should look for in exercise balls that are used mainly for sitting, definitely a good workmanship and a thick plastic layer (anti-burst). In fact, I found this advice also in that obvious because I have no carpet, but rather an older wooden floor in my study. Unfortunately, this has quite a few bumps, even though I still did not splinter in the foot. Finally I decided to MAXAFE, also because this is the only series that can be repaired, but if a plan coming in through my floorboards. Another consideration aimed at the size: A ball for gymnastics exercises must - as I have read in a wide range of specialist literature - not necessarily as large as say the standard size chart. It states a ball diameter of 65cm is suitable for people who are between 155 and 175cm, and for the balls to be used mainly for sitting in front of the desk, that's true. I think that if you want to train different muscles and parts of the back, again should ask a physiotherapist when purchasing a ball for gymnastics exercises, and VA. As the Pezziball arrived (by the way very quickly and easily) has beaten me when pack up and smell the vanilla-like counter, but I'm not very sensitive and even smell 20min. later I perceived nothing of it. Although I had based on other customer reviews already considering to buy me an extra pump for the ball, this investment was then but obsolete. According to the manufacturer description of the ball is to be initially inflated to 80%, then you let it rest for 24 hours and then pump him full on. I have the ball actually filled with my bicycle pump and the supplied adapter with air. This has actually taken 1 hour on the first day until I had reached 80% felt the air filling. From an accurate recognition of these 80% I recognized nothing on the ball and directed me to my mind. The next day I was sitting with my pump again 1 hr. There until the correct volume was achieved. The bottom line for this purpose in terms of the functioning of the adapter and the basal feasibility: very good, I have nothing to complain about. However, all who want to save this time and also the muscular exertion, the sweat and sore muscles in the biceps, think about other ways of filling air. That when plugging the seal air to escape, because no corresponding valve was installed in the ball has already been mentioned in other customer reviews. I was prepared for it, and it did not bother me. The plastic shell of the ball seems to me sufficiently thick, so I've definitely been thinking about nothing small splinters out of my wooden floor. The brochure I found nice, even understandable, but somewhat irritating to read, since all available languages are more or less confused mixed. Imagine, the description of a DVD player wätre not in single voice section divided, but for each image (eg the ports) would successively written 4x the same description in each another language. It is more concerned with looking than reading. Accordingly, I would speak less of a brochure, because all information (product description and gymnastic exercises) actually fit on the front and back of an A4 page. The exercises themselves, which are described in the "brochure", are better known, so in no way surprising or refreshingly new, but they probably are among the most common standard exercises the physiotherapist, but I find it nice and also helpful if you all again Black has to know. I am completely convinced of my purchasing decision with regard to all considerations. On my next visit I will ask the physiotherapist for exercises specially with the ball.