These yachts have a cockpit that is the envy of most 40 footers being about 8 foot long.
Study the photos in the link to this yacht for sale and you will start to get the picture.
The mast is well forward, sitting atop the f'wrd companionway which is well reinforced.
This means that the mains'l carries most of the drive and they do not sail well on jib alone. Also the mast step is f'wd of the parallel dagger board which probably puts the centre of effort of the main directly above it.
The dagger board is 10 kg bouyant as long as you do not snap it off by grounding, and is a neat fit laid in the cockpit sole.
The keel is fixed and is a lead moulding that is bolted to the bottom of the hull and has a slot through which the dagger board is pushed to it's stopper.
The depth to which the dagger board protudes below the keel is set by rubber door stop wedges that are jammed between the board and it's caseing. Beware the f'wd hand that is standing above the dagger board with legs spread while sailing in shoal waters. A slight grounding could possibly ruin his chances of fathering future progeny apart from ruining a good day's sailing.

and

and no more

for quite a while.

So to your question Felix of "what is the accomodation like?", I say to you now that it is fantastic considering that four adults and two children can be accomodated for sleeping below deck in warm and dry bunks.
For you to believe me and understand how that is possible on such a performance yacht you will have to bear with me while I explain how it all fits together.
The hull has quite a fine entry that progresses to a substantial beam that only tapers off slightly aft of maximum beam. This gives good volume compared to length and allows a GREAT Cabin aft.
The way it fits together is best described by working from bow to stern.
The fore deck has a high field lever for tensioning the rig, then a very neat deck locker for the anchor, chain and rode. Below that is a shelf and locker that serve as a foul weather galley.
Aft of that is the f'wd hatch, cabin trunk, mast step and f'wd companionway and small bridge deck. Aft of this is the sailing cockpit/living room (huge).
Right at the front of the cockpit sole is the daggerboard slot which also is the cockpit drain. Just behind the daggerboard trunk is the WATERTIGHT BULKHEAD!!!! How much better can a trailer sailer get???
Just in front and just behind the W/T bulkhead are the port and starboard f'wd and aft bunks and in between the aft bunks are the two kid's bunks all with plenty of storage space under.
You may now understand why I say these yachts are decades ahead of their time. Cheers Cisco.