Depends on whether you like manually focusing or not. If you rely on AF, a MF lens will drive you to drink. If you love to MF, then it'll be a fun lens to use.
I think it also depends on what you plan on using the lens for. If you want to do anything that requires a fast focus, like sports, and some wildlife shots, pics of the dogs playing for example. You will greatly miss the AF option.
i'm pretty happy with the lens i've got for shooting the dogs playing and running outside. i want something that will take portrait-type shots in crappy light, but which i can afford.