I joined the Remoska club, It's has already cooked some great stews, warmed up pies and baked potatoes, however I find that a lot of the recipes also require cooking in a frying pan before adding to the Remoska. This means that I still need extra cooking paraphernalia to be packed in the van, the advantage is that I can save on my gas using the EHU. I have noticed that although it has four steam vents in the lid it collects a lot of condensation in the handle where the electrics are and this has been a cause for early failure of the product.
I have had the small Double skillet for eight years, it will do almost the same as the Remoska and more, I can use it as two deep frying pans, two pans, an oven, a steamer. The heat diffuser can also be used for warming things up. It's not electrical so longevity is assured and has already proved itself. The only extra cooking item I need is a milk pan. The downside is that I use my gas, although I tend to get two and a half seasons out of a 6kg calor lite. You cannot grill things or cook pizzas as their is no direct heat from above. This oven is ideal if you wild camp with no EHU.
The verdict:
They are both great bits of kit, however for versatility, durability and as a camping accessory in my opinion the double skillet slightly top trumps the Remoska.