I've used H1 Spydercos for quite a long time now. The fact that H1 is rustproof was always its main draw for my intended use. First one was a serrated Pacific Salt. Worked fine. When they came out with the Atlantic Salt, I got a serrated one because the straight edge suited my use better.
Then they came out with the Tasman, which was what I was really wanting all this time. But in use, it had flaws. The serrated one, with the 2 small serrations before the plain section at the tip, tended to snag and drag rather than slice. Especially through cardboard. But even with thin plastic bags it wouldn't slice cleanly through, but ragged and jagged. So I swapped it for a plain edge. I'm on my 2nd one now, having heavily used and worn (mostly through resharpening) the first one into retirement (the knife, not me). The problem with the plain edge one is that the edge retention is atrocious. And I don't know if it was the steel or just me, but getting a good edge on it was always far more difficult than it should be.
For several months now I've been using a serrated hawkbill Dragonfly Salt. Since the extreme majority of the cutting I do with the hawkbill is done towards the tip, I don't miss the extra blade length. The larger serration scallop nearest the tip slices rather than drags. And even though most of the use is in such a small section of the blade, I do find that it holds its edge much better than my plain edge Tasman Salts do.
I'm sorely tempted to get a wharncliffe LC200N Salt with a plain edge. But I hesitate because I'm not certain that it'd suit me better than my Dragonfly. Since I'd only use the tipmost part, I'd likely be resharpening only that part, and that'd cause uneven wear that wouldn't be disguised by the serrations or shape of the hawkbill on my Dragonfly. If they ever make a Tasman with LC200N though, I'll be the first to place a pre-order.