Of course it is, and I actually plug it with a link pretty often. If every S owner in this thread had opted for an M first thing like me, they would think its the best one. Conversely for the M owners I'm sure, because the products are just that good.
We are all gaga over these things because they work so well, and I think you have to experience it to believe it. Those of us who have...S or M simply want everyone to see how nice it is having one of these gems. Going into my fourth season, I still feel like I got a heck of a deal, and mine has had a rough and tough life.
My buddy (mrcarcrazy) who lives here, opted for the Z5 and best we can tell, its an M4 with different clothes on. If I ever decided to go with something under the M5, I think it would be my first hard look.