Jet Ray is LEGO set 8518-1. It has a score of 45. This is bad compared to all other sets. The set is recommended by 0 reviews, based on 2 scored reviews and 3 reviews total. It is ranked in the bottom 1.05% scored sets on Brick Insights. We know this set was released in 2010, and it is categorised in Ben 10: Alien Force.
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I bought Jet Ray for the pieces. I can always use more red parts, whether in system or BIONICLE-compatible limbs. I don't regret my purchase. However, as a set, I cannot say that Jet Ray is worth the large price tag. He comes with 17 pieces, and costs around $15 USD. Tahu Star has 19 pieces, and costs around $9 USD. I think that's a point that makes itself. As a stand-alone figure, Jet Ray is kind of fun to pose and photograph. He comes with a wide-range of new pieces, and that includes an awesome torso and winge/glider piece. But as Ben 10 is marketed to an even younger audience than BIONICLE (I'm assuming, the age range is lower on Jet Ray than on Tahu Star), I just don't think most BIONICLE fans are going to be very interested in this. And in that regard, I cannot reccommend this as a worthwhile purchase. Especially at full price.