Also just a reminder: little disks will loose life cycle faster than larger ones.
If that tool is good or bad depends on the personal needs. With disk encryption (and strong password) we usually don’t need to delete files in such way anymore.
It’s more important in specific cases like the two or three files your really really want to be deleted (so this tool can be used for specific very files instead of every deletion) and here you don’t have to be worry about disk life. Another case could be that someone has access to your devices (with your permission) and you don’t want this person to have access to your deleted files.
All that doesn’t save you from people who compromised your system, but in this case such erases also doesn’t help anymore (because files got read before).
So all around it can be useful, as long as it wont be taken on every file, especially on little SSDs.