It's the best thing I could have done! I have my life energy back, no more exhaustion, no more constant headache, I can look at food without revulsion, while the fat continues to melt off, even after a day of indulgence (as much as one are able to on a glp-1).
When I wanted to switched over I had the same questions as you. Everybody told me how cautious I should be, I got advice such as, first titrate down, start at the bottom again, even suggesting super low starting dosages such as 0.5mg, because of "how strong it is". Double stack low doses with tirz at first, cause you know - "the dreaded food noise will come back on reta!"
At that point I was on 5mg tirz. I decided to throw caution to the wind, and started reta on a conservative higher low dose of 2.5mg (my supplier uses the same dosage protocol as tirz), and waited for this "terrible strong glucagon to create havoc on my body" - nothing! I felt great! The next week I went up to 5mg, and I still felt great. I worried for nothing, I probably would have been fine going straight over to 5mg reta as well.
I don't have food noise on reta, I have the same suppression I had on tirz, I can eat just as little on reta as I could on tirz, I stay full just as long as I did on tirz - but I have more life energy, and that's EVERYTHING. I should have started on reta, like I initially wanted to, and not listened to the "always start at the bottom glp-1" crowd.
Good luck!