I used the lightingshrink.com product today and I must say it is certainly faster than using the ACE connector. The ratcheting crimp tool does a really nice job of making a tight, clean compression of the barrels. As hard as I tried I could not pull the connections apart. The extra length in the sealant tubes was greatly appreciated too. I spoke with the Manu. today and found out that the tubes are not Aluminum. They are tin coated copper. The prices have been updated on the website too. For contractor accounts they are willing to establish special NET pricing based on volume. Here is another point he makes: "The couple of guys that feel they have found similar products at cheaper pricing, I will be suggesting they buy a sample pack and compare. The products we have tested since the mid to late nineties are clean metal (not dirty slag connectors) and the tubes have the right amount of adhesive that runs true." I expect you will be hearing directly from him here on lawnsite by the end of the week. Have a great day.