Okay, so I finally got around to cleaning my AC unit with this Cestluck kit. Let me break it down real quick:

The brush is LEGIT. Like, way better than I expected. Stiff bristles but didn't damage anything, and guess what? Zero bristles fell out after cleaning two whole units. That's a win in my book.

Now the fin comb... meh. It's like trying to comb through my toddler's hair after spaghetti night. Works okay for small bends, but my unit's fins are packed tight. Ended up bending some more trying to force it. Pro tip: skip the handle - way easier to control without it.

Weird thing I noticed - the comb straightens out the factory crinkles in the fins. Not sure if that's good or bad, but airflow's airflow, right?

Honestly? Most people just need the brush. But for the price, getting both isn't bad. Just don't expect miracles with the comb unless your fins are already messed up.