Glocks are good guns.
I find their grips a little "chunky" for my tastes, but had a great Glock 17.
If you can't handle the CZ double-action trigger (and some can't), the shorter Glock "safe-action" trigger might be the answer.
(The Glock isn't really a double-action gun. DA guns use the trigger to cock and release the hammer or striker. With Glocks, the slide cycling partially SETS the striker, and the trigger further cocks and releases it. It feels like double-action, but is slightly different.)
Which is better? The Glock or the CZ? Both are great guns. Only you can decide which is best for you. Preferably by renting both and shooting them a lot.
Personally, I prefer the 17 over the 19 -- its only a wee bit larger, but the mags can hold more rounds. Many folks prefer the 19. (I'd really like to have a Glock 34, which is a 17 on steroids...)