I have one of the donut-reticle SWFA HD 1-6x. Got it on Black Friday sale a couple years ago. I think, after some experience, I would have preferred the T-reticle version they offered at one point. I don't find the "donut" to be too busy on 6x, mostly because the ring is outside the FOV at full power and it's a handy reference at 1x, though I think it's never going to be as fast as a red-dot, or probably even a SFP illuminated dot on 1x.
That said, I do think the glass is decent--maybe not amazing, but decent. I find myself liking the FFP aspect a lot more than I expected to. The illumination seems like it's really meant more for lower-light conditions than to create a quasi-RDS reticle. It's okay in moderate light but full sun is not its friend; better off just going with the black reticle when it's that kind of bright out. I'd call it "daylight usable" rather than "daylight bright"--some of the reading I've done suggests that's a side effect of the FFP design.
The field of view is a bit limited, and I have to wonder if that's not engineered in to crop out edge distortion or something. I'm nobody's engineer or optician, though. It does kinda feel like that, though, when I'm looking through it.
It's a bit heavy, but looking up the Razor Gen 2 weight, I guess it's not the heaviest 1-6 out there. Then again, the Razor seems like it has better FOV and maybe a bit better glass, plus much more daylight-bright illumination, so maybe it's worth it the weight? But I paid about half what some folks in this thread have said the Razor sells for, so there's that.
All in all, I'm reasonably happy about it, though there are a few things I'd change if I had the chance. I got this scope, though, with the intent of it being a magnified optic that had a 1x (or near enough) capability, rather than the reverse. Maybe it's that outlook that has me OK with the FFP and the mil-crosshair reticle? I do need to spend some more time working on estimation of range and internalizing reticle hold-overs for range and wind.
I have to add the caveat that I didn't spend very much real time hands-on with many other 1-X optics. I have a Leupold non-illuminated 1-4 from their hunting line, and I've looked at a few in stores or on friends' rifles at the range but not serious use time. That kinda sold me on FFP, really. Something about it just seems more intuitive to my brain.
So I guess if I had to sum up: I like the SWFA okay since I so far prefer FFP, but I'd recommend to get it on sale, and it has some notable limitations and caveats compared to others on the market. It's also been out for a bit and I think it's starting to show the age some.