MtnDiver
Guest
I also have both. I bought the Twin-Jets from LDS during OW class before I knew any better. I bought my Jets at a secondhand store for $10, added a pair of spring straps to them, and haven't worn my Twin-Jets since.
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Spike_Digger:I could not maintain a level position in the water without constant finning action.
Spike_Digger:I recently had to replace my fins after they were stolen. I had a pair of Mares Avanti Quattros, which I disliked because the complicated buckle system had a tendency to open up at the worst of times. So like you, I read the posts on this site, looking for a set of fins that had a more reliable attachment system. The SP Jet fins seemed to be very popular, esp. with the tech crowd. They have no buckle to open up, the solid fin is preferred for maneuverability, they work well on the surface, and they're relatively cheap. Sounded good to me. My LDS didn't offer them, so I bought a pair online, and tried them out last week on a trip to Cozumel. I compared them to my buddy's SP Twin Jets, and I can tell you, these are 2 entirely different fins!
The biggest thing I noticed about the SP Jets was the weight. My size XL Jets weigh over 3 lbs each - around 6.5 pounds for the pair. The end result was that my feet were overweighted, and I could not maintain a level position in the water without constant finning action. My air consumption went through the roof. They are also amazingly stiff. Not just the blade, but the foot box as well. After a week of diving and constant finning action, my feet are heavily blistered and covered with band-aids.
For comparison, I tried my buddy's SP Twin Jets. By comparison to the Jets, these fins feel like wet noodles. I hardly felt any resistance at all when kicking the Twin Jets. Propulsion and maneuverability were noticeably reduced, however. They were also positively buoyant, which allowed me to maintain a comfortable horizontal position in the water.
As another poster mentioned, you will need to try different fins for yourself to decide. If you require negatively buoyant fins for proper trim, have the leg and foot strength to push a stiff blade, and want maximum maneuverability, you may enjoy the Jets. If you would rather have positively buoyant, comfortable, lower propulsion and less maneuverable fins, then the SP Twin Jets might be appropriate for you.