I've used AgentSecure for a couple years now. AS is good for "in-the-box" traditional risks. If you want to step outside the box, stay with a good MGA or Wholesaler. AS uses a nice, user-friendly interface that saves the trouble of dealing with Acords. Average quote time is around 10 minutes (to input) and usually, you'll have results back in less than 15 minutes. Underwriters are enormously busy and overworked (as usual), but still surprisingly responsive. BOP pricing is tough to beat, descent personal lines, but the personal auto pricing isn't the best. Travelers has made a big push in the Western region lately, so they have really gained huge ground from a competitive standpoint. AS has different monthly programs (price and commission levels) just like the others, but they don't push either way. You choose and live with it or don't. I've recently looked at and considered Insurance Noodle, but have concerns about turnaround time. They've got a few more markets and good access, but for our purposes, AS works fine.
P.S. - One of the nicest features of AS's system (in my opinion) is the ability to input something and then grab the completed Acords in PDF format after entry. If you get declines from AS markets, you simply grab the Acords and take them to your friendly MGA, who will be more than happy to quote your risk. Pretty slick feature!