Guys if you live in the US go and buy it, dont even think about it!
I wanted to buy it but shipping would cost me allot(international shipping) so i'm going to save up a little bit.
The fact you can work lenght and girth at the same time without fluid build up, and relative to the extender, in a much shorter time span is really amazing!
From my experience, if you are a student or you have privacy at work, the extender is great. You just put it on. But it is not something I would want to go outside with because you need to adjust it and watch it and squating down to pick something up is not easy!
And comparing it to the bathmate,which is a great pump and I have enjoyed using it. But it really takes time to set up everything around the session itself , warm water in a seprate container, you want to use it in summer time,privacy,getting the right seal. All those things made it useless for me.
That is why I think the MOS pump with all its extra stuff(sleeve,cup,mode for water pumping, etc...) is a superior product and it would my personal favorite.
My only concern is the cylinder size, picking up the right one and the possibility to outgrowing it.