Thanks all, good to hear most people see changes after a few months rather than weeks. The notes about straps and comfort were especially useful for travel worries. Appreciate the input, I’ll keep an eye on this thread for updates.
Bought one last summer, simple to use and clamp stayed steady on a few chains I tried. Guide keeps the angles consistent and I didn’t mess up any teeth. For the price it feels like a handy little buy for regular home use.