I left some things out in my 1.0 experiences post:
It's easy to tune out the text ads. I forgot to mention them before because I forget they are there.
A little slow on my 1.5 ghz Powerbook, Safari 1.2, DSL set-up. Apple Mail isn't a speed demon but it beats this pretty easily. Price you pay for a Web app vs. a desktop app perhaps.
Really like 20 or so 1 and 2 character keyboard shortcuts for things. (n)ext, (p)revious and many more. No command-this and command-that here.
Lots of good online help! Pleasantly surprising for a beta service.
I like the novelty of Gmail. It's fun to experiment with a different model without folders and a powerful search engine.
It seems that you need to click a checkbox on each individual mail that you want to label or archive or whatever - you CAN mark a whole page at once which sometimes saves time. But clicking on the little checkboxes is a pain. I often miss the checkbox when trying to click several quickly. Shift-click would be a big improvement. Click and drag would be better.
Major cool feature: any extra room beside the subject is used to show the first little bit of the body of the email. This can be really helpful in quickly identifying spam.
Much prefer labels to folders. I frequently want to classify messages under more than one heading.
After you've applied an action, the highlighted action summary feedback at the top center of the screen is very helpful.
Looking very good for a beta webmail app.