Regardless of your opinion of the Cayman's styling or its relevance to the Porsche "universe", the oft heard criticism about its pricing may not be justified.
Consider that in terms of USA MSRP:
1) The C2 Cab is essentially the same price as the 997S
2) A 997S with X51 will cost more than a 997S Cab
3) The "base" Cayman will most certainly be priced less than the 987S
The common theme is that Porsche demands a premium for horsepower no matter how incremental (insubstantial??) the increase. The argument that a hardtop by nature should cost less than a convertible does not apply to other Porsche models when HP is taken into consideration. It may be more forthright to simply state that one does not care for the car (for any of a number of reasons) rather than to label it a poor value compared to its ragtop sibling based on the pricing structure of both 987 and 997.