I have the Mariner and it's a really good flier. I have a Irvine .53 on it. The pylon engine mount isn't as robust as I think it should be. The motor shakes it like crazy, so be sure to lock tight all the hardware. Especially the Irvine carb cam screw. The covering is thin and there's not much seam overlap. I ran thin CA down all the hull seams. Ultracote orange didn't match the color either. OTher than these opinions, it's a nice bird. I like it's performance over the Seamaster because of the hull design. The Seamster is real skippy and bouncy with the flat hull. The Mariner has a V hull. Makes for nicer touch and goes. You won't go wrong with either one.