it is possible to lose the 10st you wana lose with the sleeve,
as u can see mixy has done brilliantly with his sleeve,
i too have lost 10st now since my pree opp and my actual opp on 28th Oct,
so thats just about 4 months but each person it different and u should not judge your loss how ever big or small with others ,
just remember this is a not a sprint!!! its a Marathon,
and a life long one at that ,
if you make healthy choices and boost up on the exercise then its certainly not beyonds the realms of possibilty
all the very best with you quest
regards steve