Blueseventy has a history of winning technology: The blueseventy Helix essentially has been the suit of choice by pro triathletes till they were paid to switch. Chrissie Wellington, Julie Dibbons, Andy Potts and many more chose the b70 Helix first. That was a good enough endorsement for me.
I looked at open water swimmers who won their events with utterly no sponsorship deals in place and again the blueseventy was the front runner. Even when you looked at the history of blueseventy technology in the swimming pool again they proved their prowess with "weaponized" swimsuits that changed the whole sport. Soon Jaked, Arena, FINIS, followed their lead. Both swimming and swimmers shot onto the national radar and athletes actually made a living wage becasue of their innovation. I swam my best times ever in a blueseventy Nero.
Though the Helix is the the gold standard for open water race wear. I chose the Reaction because I will never be an elite swimmer but I still want access to the best mid range technology I can get and I trust b70 for that technology.
The photo above is Andy Potts before he was signed with TYR wearing a blueseventy Helix.