For me there is one huge missing thing. namely the smell that real TAs give off. especially the good bengual ones. i have never had a smell like that in 4 years of trad indian cookery, and 2 years bir cookery. when you remove the lid off your TA, bam it gives off a unique unmistakable odour. what the hell is that? a vegetable? surely it cant be from a dried spice? or can it? its not the base, as i have purchased real bir base from a top bengual bir. and my curry tasted the same as normal. oddly they had pumpkins in the bir kitchen i visited? although i doubt its significant.