So I brewed a pale ale using the new HEX yesterday. I also ended up building a new HLT and a new MT out of stainless steel stock pots. I missed my initial strike temp by about 8F. The HEX did a good job and I was able to bring the temp up to my desired mash temp in a few minutes. I timed it and I was able to raise the temp by almost 1.5F per minute. This is slightly better than with the old HEX as it was about 1.2-1.3F per minute. The volume of the new HEX is slightly less than the old (2.25 vs 2.5 gallons) and it also has a little more tubing in the coil than the old one, but the elements are the same (1500w).