I would just read people's individual threads.
Honestly though, it's hard to describe the car until your ass is in the seat. Everything is fast now, so describing "feel" is more difficult.
I've got a fairly decent amount of seat time in most of what is available. You have the regular cars (GT3, 458/488, 650S, Huracan, Aventador) and the specialty cars (GT3 RS, Speciale, 675LT, Aventador SV, etc). The GT is definitely on the far end of the specialty car scale dynamically. I have not driven a 488 or 720S yet, but have lots of time in all their predecessors.
The biggest thing that will jump out to most people is that the GT, despite being a car with a lot of electronics, is a very "pure" and raw driving experience. The hydraulic steering, chassis behavior, braking, etc are all just phenomenally accurate and totally unflappable. On the track, it just does what you want, when you want every single time, in a controlled, predictable and outright joyous manner. It will reward you by making you a much better driver than you are because the chassis/suspension are just superlative. You feel everything, and partially that's because your ass is only about 3 inches off the ground and you're bolted directly to the floor. Everyone always says "race car for the street" and it's always bullshit. No really, with this car, it is truly a race car for the street. It feels like a giant 650 hp Radical and inspires that same kind of confidence when flogging it.
I literally can't believe how ferocious the braking on the car is. That is the most eye-opening thing about it. Even McGowan, who is certainly a better driver than essentially everyone here, says he still can't wrap his mind around the braking capability. And they never, ever go away. I certainly did not have the balls to brake any deeper at UMC on the main straight. If you drill the brakes at 160 mph in this car, it will tear off speed so fast you won't believe it, and it does it in a straight line, with no nerves. If you brake hard in a 675LT like that, it has a weird and unnerving shimmy in the ass end.
As for raw speed, last night I messed with the launch control in about 60* ambient temps. The car is massively fast and I LOVE the LC function. Sounds like a super aggressive two-step. Engine sounds amazing. I can't get over how gnarly the 3.5L is compared to the version in the Raptor. Between 3500-and 6k it's an animal, and I think on the LC the trans shifts well before redline because it's unlikely to be faster there. Doesn't have the top end rush like you get in a 675LT or Ferrari, but it will punch you in the guts long before they are making power. I would say last night in those conditions, I could see the car hitting 138-139 mph at a drag strip. Eventually I'll put it on a dyno, but I think it probably makes a little more than advertised. I've heard some have run in the 660s at MNV before leaving the shop.
I also like a lot of the little stuff. It has SYNC 3 and the shit just works. I know that sounds dumb, but I'm driving this thing around and I've got the nav running, tunes on Spotify, I'm answering phone calls, and it all just works. Leno said the same thing to me. Usually that stuff is poorly sorted afterthought in supercars, so it's nice to have it function since it's from the mothership. I had a 12C for a year and the nav never figured out it wasn't in Pennsylvania. :lol Suspension on the road is really excellent. I never even mess with the comfort setting because it's comfortable as it is.
Another big thing for me is the symphony of mechanical noises the thing makes. Lots of engine noise, fan noise, various clicks and whirs. Reviewers piss and moan about these cars being loud, then they get supercars that are glorified ultra fast daily drivers and say "oh no it's boring." To me, I don't drive this stuff often. I drive a quiet sedan most of the time. I want to see, hear and feel the whole shebang in a supercar. The GT does it. It has an incredible sense of occasion that a great many supercars that shall remain nameless today do not. I get out of a lot of modern supercars and think "meh, don't ever need to drive that again." GT is like "shit, how am I gonna keep the miles off this thing?" It's like a Murcielago SV vs. an Aventador. An Aventador is objectively better in every sense, but not in the one that counts; the feels. There is never a moment you are in the new GT where you aren't viscerally reminded that you are in a special machine.