I have 2 of them. A Brother Homelock 834DP (my favorite one) and a White Speedylock. I prefer the Brother machine, it is much easier to control than the White. The White goes so fast no matter how little you press on the foot control. Both are 4 thread, with differential feed.
I make just about everything on them. Certain things I sew on my regular machine first and then finish the seams on the serger.
SewCrafty - I was just given a Brother 834DP Serger and I really need to see someone use one, I am just getting back to my domestic side lol - what do you recommend and how old is this model?