In think they are worth it. I have 2 canvas craft insulated portables and they really hold in the heat. I have never owned an uninsulated portable, just fished in friends and when it’s cold with some wind – they didn’t seem to do that great holding the heat in. It depends how much you want to use it and how much the $ difference is I guess, but for where we are the insulated ones are the way to go.
Very worth it,have been using Frabill r-tec for last 2 years and would not think of buying an uninsulated one the one I have is on a predator base,this house is built to be pulled by a machine,this year there many more options ,smaller houses with 3m thinsulate from Frabill as well as other companies although I am not familar with those