Hi emin-j, I guess you'll have to make your own mind up after you've eaten it.
I've tried about 5 bases from this site and none of them have beaten the Taz base for the finished curries for me. What I like:
Simple to make
No carrots, potatoes, cabbage etc.
No fresh corriander or dried methi (I prefer to add these flavours when making the final curry)
Tastes quite nice on it's own
Simple balanced spicing
If you make it to spec be aware that the whole cumin and corriander seeds take some blending. I have tried it both with whole seeds and ground powder and find the whole seeds give the base a pleasant nutty flavour.
You can use any spice mix you like when making the final curry with this base as the base spicing is quite low.
Finally when cooking with it make sure you get the base nicely reduced, at least the first 200ml or so, as this creates the deep flavours in the curry.
One downside to this base is that if you are making a korma or CTM there is probably an excess of oil in this base. Not that these dishes don't work - it just piles up the calories.
Paul