Cost: I almost got Sea Legs on our 2017 SPS hull. My quote at the time was approximately $8k too. Not sure if being a tritoon was the reason, but I suspect that is the case. Also, since our boat was already ordered with underskinning, there may have been related cost with removal and changing that to accommodate the Sea Legs after delivery - again not sure. Never got to that point...
Warranty: When we ordered our 2017, they told me Sea Legs did not negate any aspects of the Bennington warranty. Since they are a Bennington dealer, with large volume sales, and periodically put Sea Legs on some of the boats they sell, I took their word at face value.
Our Decision: Since our boat was geared towards water sports usage with an SPS hull, 200 Mercury Verado Pro, our first boat so ordering with no prior experience, we decided to forgo them due to the hit on performance (weight + drag).
IF the focus of our Bennginton wasn’t going to be A LOT of water sports, then I would have 100% went with Sea Legs instead of a traditional lift at that time. Our lake depth and bottom is PERFECT for them. However, we do as much or more water sports, than anything else.
The other reality I have learned since our purchase is with the speeds we go for 99% or our activities, including water sports, we’d still be fine with the Sea Legs due to both our S-series Tritoon hull, and particularly our KICK A$$ Mercury Verado Pro. We’d use a little more gas, but that is the main drawback with that hp on the back of the boat. That Mercury is a beast for a 200hp!
HOWEVER, I often regret not going with Sea Legs; particularly every time the lake is rough and I have to try to get my boat within the perimeters of our lift/canopy - or we forgo boating due to water/wind conditions on our large and open lake. Also, our lake level gets so low by the end of August, we have to take it out for the season. With Sea Legs, we’d be able to milk about 6 more weeks of boating out of it every year.
I personally think they are an awesome option depending on lake bottom and depth, intended boat use, etc... But like EVERYTHING else in boating, they are not for everyone, or for every situation.