Google Sketchup is a great little product! I've only marked it as 4 stars because I guess it's too basic for serious 3D users. But for those of us who only want something quick and simple it's wonderful. And it's FREE.

An easy download and a simple and effective tutorial facility on the website too.

I'd recommend you try it because it's like other Google stuff - easy to set up and easy to use. I was up and running within a few minutes; chances are that you'll be able to decide if you like it quite quickly so even if it's not for you, you won't have wasted time or money by having a look.

I'm only at the basics stage and it is just so easy to use; and it appears (not yet sure) that there is a shedload of more sophisticated aspects I've not yet met.