Hi Paige,
I've been on pellets/implants for the last 12 months. Wonderful things!! They last me 4-6 months at a time. The endo takes a blood about 3 months after implant and we track the levels from there for the next one. My E has been wonderfully stable since being on them!
You don't have to remember to take pills, you don't come off them for surgery. Win win as far as I am concerned. A bit more expensive is the downside for some girls.
The only bad thing for me is that I have a mild allergy to the local so I itch like crazy for a few days. I have them in my tummy, I know some have them in the bum, but that sounds too painful for me! I'd fidget when sitting!