A mod is just an unofficial modification. It doesn’t mean it’s good or bad, it’s just something that anyone is free to do, modify their game to best suit their likings.
If you like the mod you can/should use it, there’s no reason not to try it.
Just make sure to follow all steps right when installing it. Always back up your save files before messing with mods.
And yes if you have any difficulties or problems when using a mod you can’t blame the game or developers if anything is wrong.