I have the 5qt Red, which I purchased from BBB for much more than what Woot is offering. Even with the ubiquitous 20% coupon. I love it.
First - the lid knob is indeed heat-resistant plastic - “DuroPlast” they call it. It is also removable. I’ve had mine in the oven at over 400 degrees without issue. My oven runs hot, btw. However, it is easily replaceable if that’s what you want.
This is a French-made product, not Chinese. The company has been around since 1928, but with just a recent American presence. The enamel seems to have a thick coating. It is not white like LeCreuset D.O’s, but a cream/yellow color. Under the lid are spikes in the form of a fleur de lis that is supposed to help with self-basting.
The 5qt is large enough for me - a single dude, no kids - to make a good pot of chili, a roast, or Serious Eat’s All Day Red Sauce. However, for larger families the 6.5qt might be better. It did do a family-size, Thanksgiving portion of mashed potatoes beautifully though.
It cooks great. The lid fits well. I’m glad I bought it. I’m tempted to get a 2nd one just because it is so useful.