Frustrating TWISP

This product is well designed, innovative, a little overpriced but generally value for money. However, buy an incredible car and then discover how frustrating it is when half the time you stop off at a filling station and they can't supply the fuel needed to run your car. This has been my experience at Twisp Nicholway. 50% of the time this outlet does not have what I need - new product (Cue) tobacco pods - simple really. Final straw for me. There are other devices out there that are as good, are cheaper and have stock! How to **** a winning formula.