I spent a lot of time talking to the guys at 4th Arrow and as a long time Muddy arm user, I was impressed. With the extension to the arm system, I really think I am going to buy one of their setups to film with this next year. They seem to be one of the more exciting new companies out there right now and I think they have a big future out in front of them.
I purchased one of the packages they put together just before Christmas. I like it a lot just from playing around with it in the house and the back yard. I can't wait for fall to roll around again so I can start using it for real.
I have been very impressed with my Stiff Arm Pro setup. I'm so much happier using my Fourth Arrow setup than I was when I was using my Muddy. Seems like a company that puts a lot of thought into design and I appreciate that.