Is

it

difficult

to                                                                use? 

Not at all just a little slow at times

I find it slow, too, but everything else seems fine. I find it easy to use for sure.  There are improvements underway, too, which will make it even easier.

I really like Ma.gnolia. I'm using several social bookmarking services, but apart from the 800-lb. gorilla that is de.licio.us, Ma.gnolia is my favorite.

I think the only gripe I have right now is login/cookie persistence. Even with daily use, I can't stay logged in.  This is doubly frustrating because when using the bookmarklet, logging in causes the window to "forget" the link information.  I'd definitely like to see the Ma.gnolia bookmarklet code (all versions) "pass through" the information submitted if a login is required so I don't have to click the bookmarklet, login, then return to the page to click the bookmarklet again.