An interesting setup, expensive? Well the pots look the same as the Primus ETA pots and these have a typical price of about £30 each, so not that expensive really (The Esbit setup can be had cheaper if you shop around).
Does it work well? OK, I tried out a 2.9 litre ETA pot using an old Turm alcohol stove and an old standard Camping Gaz S200 and the results for boiling a litre of water were
Turm 7 minutes
S200 just a little over 5 minutes (previous test with an Optimus Nova came in at 3 minutes.
Some will argue "whats the rush" I counter that with look at about the 50% fuel saving.
I would think this a perfect winter set up when you need a truly 100% reliable stove.
So based on the assumption that the pans are as good as the ETA pots I would think this a good buy, and I'll be indulging for sure