From what I have heard, it's not worth it, especially not yet. I would suggest an upgrade to Snow Leopard so you will still get security updates and such (you won't notice a whole lot of difference from leopard), but it seems like there is quite a bit broken in Lion still, and some of the new interfaces are counterintuitive. If you really want a good idea if it's right for you though, you could go mess around with a Mac at an Apple store and see if you like it.