I agree with DocJ in that it should help contribute to retaining muscle gained on a cycle. I just don't think the average recreational bodybuilder has much use for it. The cost/benefit ratio just isn't worth it IMO.
Insulin could probably be used in the same capacity with almost equal results for a fraction of the cost. The problem being, most bodybuilders are either scared to death of it, or don't know how to use it correctly and wind up putting on more fat than muscle.