TL;DR: not a pitch perfect Gilmour emulation, but a damn near perfect pedal in its own right.
I'm not saying you CAN'T nail a good Gilmour tone with this pedal, but the really fun stuff is doing something decidedly less Gilmoury. The fuzz is a fantastically muffy affair, but it's a little more aggressive than the silky smoothness one typically associates with the man himself. I'll stick to my Muffuletta for Comfortably Numb, but honestly, the roided out sound of the Dark Side's fuzz lends a super gnarly, almost Hendrix-esque blues vibe to Money. I was hoping this fuzz would eliminate the need for my Muffuletta, but they're two different beasts; no mode on the Muffuletta matches the grit of the Dark Side's Fuzz, but the Dark Side is quite a bit darker than the Muffuletta and lacks some clarity and articulation (the former of which I resolved by boosting with a BD-2). Ultimately, The Dark Side captures a vibe that the Muffuletta doesn't, so I will likely be keeping both.
On to the modulation side then; I'll start with the Phaser/Vibe, which is fine, just fine. Blending between the two gets you some pretty cool textures, but as these effects are basically the same, it feels a little redundant to have the blend, and perhaps replacing either with something a little more oddball would have been more fun. Not that it matters to me much; the range of the rate/depth on my EQD The Depths, combined with it's tone and low end controls, make it much more useable for me, and I don't see myself really using the Phaser on the Dark Side.
The Delay actually sounds pretty great; it doesn't quite capture the atmosphere of my Boonar (to which I compare it directly because they're both supposed to be Echorec simulations) but it's a great sound; as I have the Boonar, I likely won't use it often, but it's rather brilliant in all honesty, and I'd be happy to use it if I needed to save space, or stacking it with other delays for some super ambient stuff. I keep my Boonar at classic Echorec time settings, but because the Dark Side's delay doesn't have the reverb-y quality of the Boonar, it'd probably be a bit better suited to rhythmic stuff (not that rhythmic stuff without a tap tempo is particularly ideal).
Finally, the Rotary/Flanger Mode. This is the holy grail of the pedal; this sound is immense. The rotary is deep and has that nice, crunchy churning you get from a Leslie, and the Flanger does a great job of capturing the more subtle nature of the original Electric Mistress (well, subtle compared to the Deluxe at least). On cleans, a blend of the two captures that great sound from the middle of Pigs. With the rate cranked and the Fuzz in front, I got the Pulse 'Any Colour You Like' tone effortlessly (though with a fair bit more aggression thanks to the fuzz).
But here, really, is why I say that this pedal isn't quite 'Gilmour'; this modulation is always either not quite enough or far too extreme for the majority of those tones. The jet-like swirl of the flanger starts blending in after not that much depth, and the Rotary mode is a little too leslie-ish (Gilmour did use on early on but it was the more chorus-y Yamaha rotary with which he really made his mark). These effects aren't overpowering, and they sound INCREDIBLE, but it's not Gilmour-specific, and people looking to capture those Hallowed tones from the 79-80 Wall tour would do well to look elsewhere.
I wouldn't, however, say that this is to the pedal's detriment. It nails the Gilmour vibe effortlessly, even if it doesn't nail the specific tones. And besides, once I'd had my fun trying to get that stuff, I ended up having far more fun dialling it in for my own stuff; I got down a fair few ambient pads, raging leads and rhythm/chordal textures as a result of the inspiration this pedal gave me.
Bottom line: it probably won't satisfy extreme Gilmour purists. But it's a great entry point to that vibe and those tones, and people looking for one of Keeley's Workstation-Type pedals that does a couple of different effects brilliantly for easy use and quick inspiration can do no wrong here!