I have a Klim Badlands suit and I think it's the holy grail of suits. I've worn it in low single-digit temperatures here in Ireland and recently at over 40°C in southern Morocco. I've worn it in absolute downpours and never got a drop inside. It is wind-proof, which makes it comfortable at low temperatures if you wear appropriate layers underneath.
In Morocco, with all the vents open and wearing Alpinestars SMX-1 Air gloves, it was comfortable until the temperature reached around 40°C. At that point, I could feel the air circulating through the suit, but it was hot air. To stay cool above 40°C, I poured water down inside the front and back of my jacket, which gave a nice cooling affect as it evaporated. I think the Badlands being windproof was actually an advantage there. The buff around my neck was air-drying, bone dry, in three or four minutes, literally. I think if I had a mesh suit on, the water I'd poured into my jacket would have evaporated much more quickly and I'd have had to stop more often. With the Badlands, I could feel that my t-shirt was wet for 30-40 minutes and I was comfortable for about an hour before I had to stop again. I was happy to stop every hour because I needed to drink regularly anyway to replenish what I was losing.
As Andres said, it is stiff at first and takes a fair bit of breaking in, but I find it very comfortable now. That bit of initial stiffness makes me feel like it's made of quality materials which will last a long time and will provide good protection in an off.
I'm not sure what SPL means about the "floppy collar" issue. In reviews, what I read about was the opposite - people complained that the collar was too stiff - but like the rest of the jacket it breaks in eventually.