We've used both the first and latest generation of this blanket. I really appreciate the improvements Ignik made between the two versions, it really shows they listen to their customers and then some when improving their products.
We've used the current blanket throughout the last part of Fall and this Winter in our unheated pop top truck camper in Montana. We use this in conjunction with a 25F double bag and in temps from 15F+ (so far), either as a top blanket or underneath. The heated coverage is excellent, especially going over two people. We really love being able to micro adjust the temp and timing setting, depending on the severity of the weather I'll run it for 2-4 hours at bed time on a lower setting and for an hour in the morning at medium before we get up. It sips power without noticing much of a drop from our 500w battery. The wiring is much better improved on this model, it seems like it'll be durable and isn't very noticeable, but long enough to reach from our cabover bed down to the truck bed. The blanket material itself is very nice and would be an effective blanket without power, my wife uses it at home all the time as well.
I have no critiques, in hind sight I would consider or might pickup their heated under pad/blanket as well. I really like having the heat underneath us and it seems very efficient to heat our bed this way, allowing our sleeping bag to capture the rising heat.