Yes! & I forgot to update this thread. Overall experience was positive. Handling & ride quality were good. No significant difference compared to my OEM mounts in that regard. I didn't experience any, squeaks, rattles or shuddering but I switched back to OEM rubber mounts because I was experiencing increased driveline noise that would resonate throughout the cabin. I'd compare it to loud mud terrains or the wawing sound of a bad wheel bearing. I had them on for several hundred miles & it occurred in all driving conditions. I was in contact with Roger from 4crawler during this time but we weren't able to come up with a definitive reason why this was happening & was the first he had heard of this. I went through all my driveline & suspension components & didn't find any abnormalities. I already had a suspension lift & 2" 4crawler body lift prior to the poly body mount installation with no unusual sounds. I don't know if the poly body lift blocks in addition to the poly body mounts magnified the noise transmission. I put my original oem mounts back in & the resonating driveline sound went away. After another few hundred miles I put the poly body mounts back in and the magnified sound returned so I ended up buying new toyota rubber body mounts & it's been allgood.
Roger was very cool & offered a refund due to this unusual issue. I haven't come across anyone else that has experienced this. The only other thing I can think of is the additional washers I have on my body mount bolts. I don't know if that may have contributed to the amplified driveline noise. Also, I had the 4crawler body mounts & the few people I've talked to I think had energy suspension. I wouldn't think there would be a significant difference in the density that would cause something like this but don't know of any other reasonable variable so I'm just guessing at this point. When my new oem mounts eventually wear out & are no longer available I wouldn't have a problem going back to poly body mounts. For now I like having a quieter cabin but want to emphasize that I have not heard of anyone else experiencing this so I would let this one incident prevent you from going that route.