I have a seismic 3914. Fit and finish is great. Lots of cool options.
Major complaints:
Electric slides and auto level. Super slow and week my slide won't even go in unless it's perfectly level. I've had lots of issues with my auto level wiring. Wish it was hydraulic like my cyclone was
TERRIBLE ground clearance. I get stuck everywhere. I can't even go in certain gas stations in there's a small dip in the ground. And it's so high if I lift it I will be over height. Beside those it seems well built.
This is not my first RV, but is the first time I have bought a new RV. Would I repeat that? Probably NOT. I have been hugely disappointed in both the quality control and overall engineering of Jayco Seismic Toy haulers. I have also looked at many other manufacturers Toy haulers. They all seem to use similar manufacturers in the build, and each have issues as well.