Athletes around me told me that this tool is effective to work his abs. This works for both beginners and experienced, if only one has no back problems and we do attention to his positions.
The wheel comes mounted in a large square box. It is certainly not very large size, neither very heavy, but seems still a bit cumbersome to put in his luggage.
The interface is rather successful, the handles are strong, well it grasps it. The wheel turns smoothly.
By cons I was very disappointed by the "driving instructions". There is a double page translated into different languages, in black and white, with photos. Except that the explanations seem complicated and confusing pictures. I have not managed to see the differences between the recommended postures and those not recommended (related to the position of the back). Instead, I recommend you type into a search engine "abdominal roll", you will fall on a very simple video within 30 seconds, and many other more detailed videos related to it.
