I too have the Brother 1034D and absolutely love it. No, I didn't need it. I does seem to help the kids clothes last longer. The shorts and pants do last longer for my 3 little ones. I love having the finished edges on the inside of the garments I make too. I use it almost everytime I sew now. Very, very easy to use and thread. I've done the rolled hem, gathering, narrow hem, and the basic 3 & 4 thread serging with it. There are still other features to try! Before I got this, I had never even seen a serger in real life

No classes needed to learn to use it. I too think it was worth buying.