Before installing any channels from this site or any other please make sure you are properly prepared.

People *should* test wads before uploading, but if something goes wrong it could render your Wii useless... forever!

Good news is that it's easy to prevent this happening as long as you plan ahead.

Common methods of brick protection are:
1) Install preloader. This way if you install a bad channel or theme you can get to HBC and use wad manager or anytitle deleter to fix your issue.
2) Install bootmii as boot2 (as IOS will not help you). This will get you to HBC again as above. Also make a working NAND backup to be extra safe!

Other warnings:
1) Never uninstall systemmenu wads or IOSs unless you know EXACTLY what you're doing and why.