Leak sensors can be handy, but honestly, they're not foolproof. Had a customer once who installed them everywhere—still ended up with a hidden leak behind the shower wall that went unnoticed until the drywall started bubbling. DIY is great for straightforward stuff, but if you're scratching your head at all, it's usually cheaper to bite the bullet and call someone in. Seen too many "quick fixes" turn into weekend-long sagas...
Yeah, leak sensors are decent for catching obvious stuff, but hidden leaks behind walls or under floors... they're sneaky. Had a similar issue once—customer thought they had everything covered, sensors everywhere, but water was quietly dripping behind the vanity cabinet. By the time they noticed, mold had already set in. DIY is tempting, but plumbing's one of those things where small mistakes can get expensive fast. Better safe than sorry, imo.