Well, I've verbosely recounted my flirtation with the Intel DRIVERS this time around.
For the Z68 chipsets and Win 7-64, the Intel RST bare drivers 12.9.4.1000 install without a hitch.
So to make a rhyme, the need to add HotSwap! freeware to my system is the only real b****. And I'd done that before -- really -- without a problem.
The behavior of Primo-caching's "L2" feature without using its touted RAM-caching aspect is the same with either MS or Intel drivers. Nor is that a particular "drawback" of Primo, except that you can't see the "benchmarks" for the L2 feature without using the "L1" feature and main-attraction.
So in that regard, there's no substantial reason NOT to use the Intel drivers, except for the need to install another software feature on your own that allows for swapping out disks without using the Intel bloat-ware.
And the changeover and change-back within Device Manager should be easy and effortless, except for the necessary reboots to complete those changes.