Use Carnation quite a bit - it adds great BIR flavour to Korma (daughter says my korma better than take away!), CTM, and recently used it with butter chicken with great results.
Used to use tinned stuff - but it only lasted for a few days, then had to throw loads away. This squeezy bottle last 4-5 weeks easily - much better than tinned stuff. Got it from Asda, but seems not all Asdas stock it.