Yeah it's pretty straightforward to use, I detest using autocad now!
It was fairly basic 5 years ago but it's got a lot better. Pretty impressive the way it integrates with other autodesk products like alias, autocad, showcase, design review. At least the ratio of inventor:solidworks jobs is better than 5 years ago 🙂 Haven't had a go on solidworks for years though.
I tip in 2011 if you are doing assemblies is to use the assemble command, you can add lots of constraints in 1 go. Just make sure you pick the the part you want to move first.
Another thing I heard on a course a while ago – the ribbon interface is designed so you move from left to right. Not always of course but the general workflow makes sense that way. Apparently that is true for all the ribbon bars, but I certainly didn't spot it 😉