I’m a firm believer in using an unbalanced valve. Easier to clean, less parts to fail. I have hundreds of dives on my two unbalanced valves. The only failure I had was not getting the Cath on properly and the Cath came off. I was very early on before I learned how to get the cath on properly. It wasn’t a valve issue, that was a condom Cath issue.
With the unbalanced, you do want to make sure that you prime it (meaning use it) on the surface before splashing. It was never an issue for me because I was ready to pee every time as soon as I plugged in!
These days with all my diving in Florida, I hardly ever dive dry. But when I do, I am fully plumbed!