scriptwright who's done the switch after years of greasemonkey Rated 5 out of 5 stars
I've finally decided to try this after greasemonkey started to noticeably hang
Haven't noticed any script incompatibility issues in my first day of usage, and there's one major advantage compared to greasemonkey: it's incredibly faster! Firefox feels slick again.
The transition from greasemonkey was greatly aided by the fact that the script converts greasemonkey's config.xml directly to it's internal format, one caveat is that the script datastore isn't transferred automatically, however this can be fixed through a bit of scripting rewriting prefs.js
nanquan noted that the icon was rather unsightly. It does look windows 98-ish, but an added feature displaying the number of scripts used on the page next to the icon does make up for it somewhat. But compared to the advantages this script offers, this is a minor issue.
One problem I've noticed is the missing feature of sorting by execution order. This might come in handy for script compatibility issues with other scripts. I disagree with the reasons in the faq. If this is added scriptish would be perfect!