This is clearly a show that does not put a significant strain on the licence payer, but is still a pretty enjoyable - even cerebral - 30 minutes of so. If you are into logic problems and those old mathematics puzzles that begin "a train leaves Edinburgh travelling at 50mph..." then this really is for you.
No props (beyond the occasional distinctly homemade ones that the contestants supposedly provide - actually more likely the work of the contestants children), a set that would have looked inexpensive on a 1960s panel game, no prizes whatsoever, and some fiendishly quirky questions. I love it! There is a relaxed bonhomie between the contestants - none of whom are really contesting - and a score is kept, not that anyone cares overmuch. Its the questions that are king, and some (such as the poser set at the end of each show) can keep you happily musing for some time afterwards.
And finally - of course - there is the sheer joy which comes from occasionally working out the answer long before the assorted Brains Trust members have even got close. "Its obvious!" you shout at the screen, conveniently forgetting the other dozen questions that had you floored. Priceless.