I just replace my Conti's (at 25k miles) with the Yokohama Geolanders. For those of you considering new, all season, M+S tires, here are my first impressions:

1) Noise levels - very quiet with less noise than the Contis
2) Handling - very quick steering response. Dry pavement traction excellent so far (not scrubbed in yet). It will rain this weekend, so I'll have a chance to check out the wet traction. Only observation is that the tires wander a bit on grooved pavement, but not excessively.
3) Ride - they seem to be more comfortable than the Contis (18in wheels).
4) Mileage - it feels like these have less rolling resistance, but it will take a couple of tank-fulls to see if there is any difference.
5) Snow traction - Tahoe is still a bit dry, so this will have to wait for the first ski trip.

Hope this helps those of you casting about.

 

are these N-rated?

 

They are 109H rated, load capacity of 2271 lbs per tire, but they do not appear to have been tested by Porsche and given an "N" rating.

 

Interestingly, I'm seeing a 5% improvement in mileage after 2 tank fulls on the Geolanders. This is an interesting experiment given all the discussion concerning N rated tires. Made it 2 miles up a twisty road at good speed until a friend with a 911 Turbo passed me, so handling is good. We'll see how things progress.

 

I put on a set of the non-N rated Toyo Proxes S/T's and also am experiencing an increase in MPG.

 

The rain has started here in N. California and these tires are doing really well in the wet. So far so good. I'm trying to dial in the best tire pressure right now.