I have been using Debian 11 since Alpha 1 release. I installed with non-free live DVD using the calamaris installer. I have it installed on three systems one Intel Celeron, one Intel i5 and one AMD Ryzen 7.
I give the installer a 5 star rating although I would like to see some improvements made to the disk configuration utility. Currently the disk configuration utility is non-intuitive and appears to be designed for keyboard only navigation as opposed to mouse navigation. No matter how many times I use the disk utility I just can not get used to using it. I have not found any show stopper bugs. I am having an issue in KDE Plasma where the desktop fails to load including the wall paper. The screen is just black with a functional task bar. Simply logging off and logging back in fixes it, so it is just a minor annoyance. Having a dedicated email list and IRC channel for installation related concerns seems like a good idea. I could see it getting used. Tim