In the Club Joker, when the toilet door is shut, you can still access the 2 ring hob, the fridge and some cupboards, but you can't get to the kitchen sink and the rear cupboards. We sold our Cali last year and bought a Club Joker last year and are absolutely delighted with it. It is incredibly well designed and built and has completely maximised what can be achieved within the envelope of a T6 - it is a genius use of space. Like the Cali, it is pretty much a go anywhere vehicle - same width, 300mm longer (LWB T6). The biggest compromise is height - at 2.8m high, you can't shimmy under height restrictions or use multistoreys like you can with a pop top.
In return for that compromise, you get so much more. Toilet and shower room, 70L fresh and waste water tanks, hot running water, wet central heating, more comfortable roof bed with Frohli sprung frame. And you can still park on one space at the pub or in a supermarket carpark. It is so much easier to live in and live with, particularly off-grid and in the winter.