I dont feel spot injection work on larger muscle groups, but on smaller muscles like biceps i get some kind of streching of the bicep which does give me some added size, but i must stress i shot my arms for a long time and they never returned to the original size.

I feel this is an individual thing because ive known other BB's try the same thing with no effect at all, i feel there will be more BB's who say no it doesnt work but there are always afew which have had results, indivdual.

Marcus