Let me start by saying these little plastic toothbrush covers are a game-changer for travel hygiene. The 3-color set (red, blue, green) makes it easy to differentiate between family members' brushes - no more accidental toothbrush swaps in hotel bathrooms!

The suction cup feature is brilliant when it works. I've successfully stuck these to cruise ship mirrors and hotel bathroom tiles, keeping my brush elevated and away from questionable surfaces. The 'double door' opening mechanism feels sanitary, though it does require two thumbs to operate - not ideal when you're half-asleep at 6 AM.

Now for the not-so-great: The hole for the toothbrush handle is frustratingly small. I had to perform 'surgery' (read: aggressive widening with scissors) on two of mine to fit standard manual brushes. Electric toothbrush users should look elsewhere - these definitely won't accommodate bulkier heads.

The suction reliability is hit-or-miss. While some stayed put through a week-long beach vacation (humidity and all), others performed dramatic midnight plunges onto bathroom counters. Pro tip: Place them lower on mirrors so falls aren't catastrophic.

For $[price], they're decent value despite flaws. I'd recommend them for manual brush users who don't mind minor modifications, but suggest buying singles if you don't need three. That extra cover really does become clutter!

Final verdict? A clever concept that needs refinement - 7/10 for effort and travel convenience, minus points for universal fit issues.