I was diagnosed in January and am now almost 6 weeks into medication.
On day 1, I felt amazing, ultra focused. It was like a magic switch!
After a few days, the euphoria disappeared and it started to feel like it wasn't working. As my dose increased, I started having really bad crashes in the afternoon.
After that, I decided for myself to split my 60mg dose, so I now take one x 30mg in the morning and another at lunchtime. This seems to keep me much more level, and I don't really notice a comedown. My prescriber was ok with this.
I'm now almost 2 weeks into taking a split dose, and it seems ok, so it might be where I end up staying.
It isn't magic, there's still lots of parts of my adhd that I need to learn to cope with better. However, it has been really positive for emotional regulation and the feelings of burnout. I'm not snapping at my family or crumbling under the pressure of family life like I was 5 weeks ago. I'm still forgetful, disorganised, can't prioritize or start tasks easily, etc.
It isn't a mirical cure by any stretch, but for me, on balance, it seems to be positive.