I carefully checked out the KK, the Topaz and a number of other campers (mini-caravans) before settling on the Ultimate. For me an internal shower and toilet didn't seem necessary as I tend to camp alone and miles from anything and anyone. When I have stayed in parks or camp grounds - they have facilities so that seemed unnecesarily extravagant for
my needs.
The major things for me are - (1) offroad ability, (2) WEIGHT and size, because it effects where you can go and (3) build quality.
I too, thought that cooking indoors would leave the smell hanging around for days,
it just isn't an issue. I love my bacon and eggs and I love a decent steak cooked HOT - so a bit of smoke and bacon fat splatter does occur when I cook. The smells dissipate quickly and let's face it, we all ventilate our campers when we have them set up. Windows open for the views and/or the air - even in these conditions
As stated previosly, the KK'van is great for 2 people - extra bodies, even little ones, will just become tedious after the first night or two.