Pros:Industry-leading processing power and firmware.Long firmware support life.Excellent battery life.Super nice display.Charges fast.Great speakers.Great glass used for the display and back.Should be more resistant to damage, in comparison to other Samsung phones (re: s20 FE) which use the brittle Gorilla Glass 3. And even if you break it, Samsung is the Honda of phones. Parts are always cheap, readily available, and as such repairs are cheaper and easier to access.Looks good while doing all of the above.Cons:The fingerprint reader is abysmal. I'm coming from a Razer Phone 2 which read and recognized my fingerprints near instantaneously, and very reliably. Sometimes this thing just refuses to recognize my prints, or takes a good second or so to do anything about it.This camera is years behind what it was hyped up to be. On my RP2 I was running a Gcam mod and generally getting better results, ESPECIALLY in night mode. I was kind of gutted when I discovered how inferior this camera array is. Lots of noise on the wide angle, tons of focus hunting regardless of which lens you're using, just generally primitive by today's standards. Is it a hardware issue or a software issue? No idea, but it's unacceptable either way. Do NOT buy this phone for the cameras. Many cameras from a few years ago are better, especially with Gcam.The display, while beautiful, has pretty terrible viewing angles. Yet another problem I thought we left back in 2015.RAM is silly low, even by flagship standards from 2-3 years ago.Meh:Samsung is still lagging behind stock android in many ways. There are a lot of redundant and pointless apps/"features" that are clearly just Samsung trying to trick you into giving THEM your data, rather than Google; and doing it poorly. Customization is somehow better and worse than ROMs which are closer to stock. Sammy put a few decent features in here for customizing, but not really anything you couldn't have gotten from a 3rd party. The launcher is terrible and restricting, but easy to replace. I personally use Microsoft Launcher with a bunch of 3rd party widgets, icon packs, etc.Conclusion:At the end of the day, this is a matter of price. When this phone was released for around $1k, it was insanely overpriced and not at all worth it. However, I snagged it on Prime Day for $699. At that price, I feel like it BARELY scapes past acceptable. $100 more than that and I would have returned it and waited to see what comes out later this year from other mfgs. The s21 line is bizarre to me. It blends top of the line features and tech with relatively archaic features and tech. I would not call this a flagship series, except in that Samsung does not have a higher-tiered line. This could have been much more polished, and it's sad they cut corners and had some critical oversights. But again, if you can get this for almost half of what it cost at launch retail, it's worth it. Don't expect bleeding edge performance across the board, and you should be satisfied.