I recently started working with Log Rescue so some of this could be "user error", but:
1. During install you can choose to install extended stored procs on the default instance or not, but you can't specify a named instance during install (have to do that later).
2. Poor support for analyzing isolated log files. It might help to have more separation between analysis and recovery modes so users can analyze without having to meet the criteria necessary for successful recovery (such as access to the full backup, no missing logs, etc.).
3. Saving a project doesn't buy you much during the most labor intensive step--Choose Database Backups--because it ignores your saved choices and forces you to select files all over again when opening an existing project. (Not such a big deal unless you do frequent transaction log backups.)
Let me know if any of this is user error!