best advice is tell them to go to a GOOD bow shop, see, hold, handle X bows, and find one that fits them best
a great bow that is too big heavy or small, will NOT do them any good, and all folks are different in what THEY like and what fits them
ALL brand name X bows are of GOOD quality today
as price tags go up, better features are included on them
and then its about practice practice practice, to learn how to be accurate and how to quickly kill a hunted animal