I'm with you Kenny, very satisfied with the upgrade to Platinum from X3. If anything, I thought my aging computer would baulk at trying to run software that was written 6 years after my computer was built, and was no speed demon at the time. I find, however, Platinum to be super stable, and I feel confident that, as far as a DAW is concerned, I can just get to laying down tracks and making music.
And even though the most important thing to me is stability and ease of workflow, I do like the extra functionality that Cakewalk has added as this has also added to the enjoyment of creating music.
Can't recommend it enough.