I think the 4801 is a nice unit. I have one myself. However, I have found with a new atty it takes a while before it starts to give a good hit. Just hit it long and slow in the beginning. Also make sure there is a lot of juice in the cart. I have noticed that on some of the carts I got, there was not moch juice in them. If you buy a bottle of juice and fill up the cart, it will work much better. If you put a drop on the atty that seems to help as well, but I'm not sure if that is a good thing to do since my addy had a premature failure.