I only use sand in every tank except my qt/hopsital tank. Not sure what could be bad about a fully submersible/ battery powered vac that actually works. Takes about 5 minutes to vac the top of the sand and another 5 to change filter socks. 10 minutes of maintenance for a 300 gallon tank works great for me.
It DOES work a lot better on pool filter sand than playsand or ecco complete since pfs is a larger particle size, but either way it works, and I house lots of loricariids with lots of poop