Yes and Yes. Especially the more recent bottle I just received.

I didn't like it, didn't seal on a couple of occasions that I thought it should have, went back too the peasant stans.

Not grit but large pieces of stuff yes, part of the sales pitch of will seal bigger holes then the normal stuff, also meant you couldn't inject into the valve as you could with the normal stuff.

I didnt have any issues with running the race stuff, I did notice when I was changing tyres that it would dry up and create balls in my tyre which had never happened in years of normal stuff use, I went back to the normal stuff when the bottle ran out.

I found the standards stuff won't seal holes at high pressures. It just fires the fluid out until it gets to around 30psi and then seals. As soon as you pump it back up, it fires out the sealing plug and you're back to square one.

I was advised in no uncertain terms by someone with good experience that it's a false economy to buy anything else for road tubeless. Hope he's right.

I nearly used a syringe, thinking how cloggy can it actually be, then I noticed that even the hole in bottle cap is much larger. It must be mega cloggy.