Cheap to buy, expensive to run. Trangia - runs on firelighters. Not quite, but nearly true. Low heat output but steady. Cannot be adjusted.
Stove comes with pots built in.
Availability of fuel is poor outside of specialist shops. I haven't used one but they have a good reputation and I have met experienced outdoors people who swear by them. I think that the only stoves burning those solid-fuel blocks are the rectangular ones that fold flat. The one pictured burns Methylated Spirits, which is available far more easily than the solid fuel you mention. It has a 'two level burner control' using a simmer ring which covers part of the burner.