Just some random thoughts...
It certainly is an interesting beast and well worth $1100.
That's not what I paid, but I didn't see the price coming down anytime soon, so I bid on the lowest Gunbroker had available.
I knew it was going to be heavy due to reading the specs (and I accepted that), but it is
front heavy. This isn't as noticeable in the store, but when you add a scope and full mag, it gets very noticeable. I prefer a more balanced gun (light or heavy) and the only way to pull that off is to magically lighten the front end by a pound, or add weight to the stock. I haven't found a way to do either.
The accuracy is phenomenal (with its favorite ammo) and well deserving of a scope. I only have five variations of ammo, so I couldn't test the gamut of what's out there. Of what I have, the WPA 122 gr. fmj grouped at 3/4" at 50 yds. and the 123 gr. fmj Polyformance and 124 gr. hp Military Classic both grouped right at an inch at 50yds.
Due to the non-flip-down rear sight, the thumb tabs on the rear scope cover required some Dremel reliefs so the cap can pass the ears on the rear sight.
The front sight took a few turns and the rear took a couple. It was simple enough to zero with the provided tool. I like that the sights are tritium.
If they had slightly opened the magwell and shortened it enough to accept drums, it would be nearly perfect. I have had no problems with steel mags and pmags. Tapcos and smooth-sided polymer Bulgarians are too wide and don't fit. The Bulgarians are 40-rounders, so I'm going to file and sand those down. Coincidently, my Golani won't accept polymer Orlites, but has no problem with steel.
I understand the need to keep production costs down, but the stock is not easily replaceable. I knew the OEM tube is oblong, but I didn't know the attachment is pinned and not threaded. One cannot simply throw any AR stock on there. The OEM unit needs to be replaced entirely, or at least from the knuckle-- and even then, you can't use stocks with integral tubes (such as the Magpul UBR and Ergo F93). You can buy a steel tube with the knuckle, but it's for collapsible stocks only.
When I decide to sink more money into her, it will be for a new trigger that doesn't beat my finger to death. That is my biggest complaint. My AKs have slap, but this has punch.
Israeli slings attach easily with the standard paracord, so that was fine.
The cheek riser is fine if you use a tall scope mount. In my case it is too tall, so I have to go with a jaw weld on the bare stock. Also, because I didn't want to remove or replace the rear sight, the position of the scope requires me to shorten the stock by a notch to have proper eye relief.
I had read that the top cover is difficult to reinstall. I was able to do it with my hands and not a mallet, but it required considerable effort. I have not noticed a shift in impact.
I'm fine with everything else, or at least I can't think of anything else. Some have complained about the pistol grip, hand guard, and lack of bolt hold-open. I say hold before you buy so you're not surprised. The rail covers on the handguard were tight and did not slop around like the ones I've held in stores. After using for a while, the right rail cover does move very slightly.
As with any new gun, I lubed the hell out of it before hitting the range and she ran smoothly and flawlessly. That's all I can think of right now. I hope it helps.