I have had a 1UP for six years and just love it. I love that fact that the only parts of the bike it touches are the two tires. It's very sturdy and I have had zero problems with it.
However, as Nate says, it has no built-in provisions for locking the bike. If that is important for you, you need to look elsewhere.
Belated Happy Birthday, Grahame!
You might ask your vet if you can get that antibiotic in an ear ointment. It's much easier to apply to the cat that trying to force something down its throat.