I have a love/hate relationship with writing sprints.
The pluses are many. It gets me to make an appointment to write. With my ADHD, I'm not good at getting myself started, but if I'm committed to meeting up with other writers, I'll be there.
While I'm a slow writer, the sprints also force me to focus on getting my words. I'm easily distractable (ADHD), and having a sprint period helps me remain on task.
Sprinting with other writers also is more fun because in the breaks between sprints, we talk.
The sprint appointments also get me moving in the mornings. I am a dawdler and can spend forever drinking coffee and playing the NYT Spelling Bee, Wordle, Connections, Strands, etc.
The downside for me is when the time is up. Many times, I've just hit flow state, and the words are coming fast and furious and I'm totally in the zone. And then the writer keeping track of time will call the end of the sprint and I wind up frustrated because it takes me so long to get back in that state.
We've expanded out the length of the sprints, many times going over an hour, but when I'm in flow, even this isn't enough time for me.
But despite all this, the positives far outweigh the negatives. I like having an appointment to write and this works with my brain. I'm going to keep sprinting.