XI-KT will certainly help a lot. Obviously diet and training are key to all gains or cuts or recomps, but all reports from XI-KT users are pretty stellar for leaning out and/or recomp goals.
Its a mild product so sides are pretty much negligible. but results are great.
can you loose 5-10lbs - hard to say or put a number on it, but its certainly possible. What it will help with is loosing the weight you want and not loosing good weight. It will help retain the lean mass you have.