If I may offer some insight on this whole thing. These vacuum companies have not paid to be on this list...Were dealers for both Miele and Riccar and we would've been told to expect people coming in with these brochures in hand, if they would've paid to be in them.
Here is my experience with this carpet. I had a couple come in with this carpet about 6 months ago, they were the first sale for a local interior design company of this new style carpet. I know it's listed as Caress above but it's also known as SmartSilk and SmartStrand. This carpet is an absolute nightmare for most vacuums and most home owners. The culprit isn't the height of this carpet, it's not much thicker then normal frieze, but it's the fact that there is no substance to it. It's so soft that anything that is sat on top of it sinks down to the base. It also is extremely dense so it's harder to open up the pile to clean.
I can attest to the nightmare that this carpet presents because my customers took home over 10 different vacuums from my store, the only one that would push easily AND clean, were the Miele power nozzles. They tried Supralites, Vibrances, Brilliances, S7's, Oreck, Panasonic and Windtunnel and T Series Royal. The height would either be too high that it just skimmed the carpet, or it would sink in and the machine couldn't even be pushed across the rug. They were almost in tears when they took home a S1 Quickstep with SEB228 attached and it worked perfectly for them. The secret with the 228 is the extra wide rear wheels. They're at least an inch wide and this, along with a very well calibrated height adjustment and the variable speed motor on the machine, make this an unbeatable 'Silk' carpet cleaning machine. I say 'silk' because most of this carpet is not silk at all, it's actually made from recycled plastic bottles, which for the premium they charge for this stuff, it seems a little overpriced.
The next biggest problem with this carpet is that they're all different. What will work on one, wont work on the other. The carpets can vary so much from manufacturer to manufacturer that we almost have to send the floor model home with the customer for them to try to see if it will work on their carpeting. So far the Miele's work on them all, and I've had several that Riccar Vibrances and Supralites work beautifully on. I'm really curious to see how well this carpeting holds up because my original set of customers came in for bags and they said that even in their low traffic household (No kids, no pets, both retired) they could tell it wasn't going to wear very well.
I figured I would share with everyone what I know about this carpet coming from a vacuum collector and dealer.