Is that mask really moisturizing, or is it just expensive?

How to say “Is that mask really moisturizing, or is it just expensive?” in Japanese

In Japanese

そのパック、ほんとに保湿(ほしつ)効果(こうか)あるの？それとも高(たか)いだけ？

Sono pakku, honto ni hoshitsu kōka aru no? Soretomo takai dake?

Is that mask really moisturizing, or is it just expensive? in other languages