Setup works fine. Biggest issue was messing up the initramfs and the kernel-module build (I've used the now 2.2.0rc and before that git because I wanted to have

Setup works fine. Biggest issue was messing up the initramfs and the kernel-module build (I've used the now 2.2.0rc and before that git because I wanted to have overlayfs support and idmapped mounts - machines running docker and lxd - so everything is native in ZFS). One issue to look out for is the activated features and the ZFS module in the kernel and in ZFSBootMenu - these should match as depending on the features it's not possible to import the pool otherwise. zfsbootmenu just looks for kernels and boots them. If something fails you can go back to an older snapshot or use an older kernel - and you have an emergency shell.