In reply to Dan Bailey - UKHillwalking.com:
Thank you Dan. All your reviews are very helpful.
One piece of info for others. Some small pots will not fit in the larger set. For example, the 1L Primetech pot will not fit in the Primetech 2.3L set, so if someone buys the big set, you might not be able to fit smaller pots well (in the case of the Primetech pot 1L, this is because of the heat exchange opening .) On the other hand, the 2.3L set has three pot stands that can be further unrolled, to fit even larger pots.