I've been at least ten times. The last time was poor (apart from the starter), noticeably so. The only other time was when I ordered their dosa, which is too carb-heavy for me these days. All other times have been excellent. I have very fond memories of their oxtail madras, pork vindaloo and mixed grills. I've had about four takeaways from them too -- and they're better than other take aways round these parts.
I prefer solid traditional British curry houses so Chilli Pickle will always be a tough sell. I've been to a couple of the fancy ones in London but when it comes to Indian I prefer a few beers and a trad Brit curry house.