I got my grandson a Sage a couple of years ago. His is a good shooting bow. I think you will be happy with one. A beginner should start out with a low poundage bow (35-45 lbs depending on age and strength) and shoot that until he/she develops good form and muscle strength. Then buy heavier limbs if desired.
Mines been great. I bought one for a buddy a couple years ago too as a Christmas gift and he loves it. I actually haven't killed anything with it yet but that should change this year. Both are great shooters and do everything a much more expensive bow will do. Changing the string is a great idea.
I will be starting my 3rd season using a 55lb sammich sage. I have no complaints with it. Killed 4 deer with it so far. Been curious to try a longbow as I hear they may be a little more forgiving. I'm still very much a newbie though so i would really pay attention to what the seasoned archers on this forum have to say.