You won't be sorry. I use mine nearly every time I grill or BBQ. It will change the way you cook. No more over-cooked steaks as you said.
Now some on here will tell you that you should be able to look at a steak on the grill from 100 yards away and tell if it is done just by looking at it. I'm not that good YET so I rely on my ultra-fast Packer green Thermapen for good results every time.
LBGE, 22.5 WSM, 14.5 WSM, Weber 26.75 OTG, Weber Performer, Backwoods chubby, Speed of light fast Packer green Thermapen, Speed of sound fast red backlit Thermapen, Ultra-fast American flag Thermapen