The ones I've tried a few years ago tasted very sweet, texture is like syrup, very gloopy. I tried to thin it out and add spices but the tackyness was too much half way through eating and nothing like a curry. I was making decent curries from scratch back then after I stopped going to the TA, tried a few jars at various supermarkets when I didn't have time to get all the ingredients and a little unorganized at home. No way I'd have another jar, it gave me a kick up the arse to get things sorted.
Still wonder how hard can it be to put something half decent into a jar. They add preservatives etc but surely its not unreasonable now to get something that's on par with a curry made from scratch.