Consider the workflow: it does not ask you if you want to remove an old installation. It does not indicate that if you need to create LVM raid1 volumes, how you should do that. It does not offer any shortcuts on creating a mirrored LVM partitioning scheme. You get bullshit errors like ‘raid1 requires two disks’ when you clearly assigned two disks. It lets you click OK on settings without saving things. Like…why is there an “Update Settings” button at all? Or if you need that button, can’t you disable the left-hand column that allows you to select other partitions? This interface is NOT HELPFUL.