Haven't heard of any hot spot issues on the GB 1 or 2. Have heard many members raving about it though!! One of the best work knives in Spydie's, or anyone's, stable.
If you don't like it though, forget it.
You can watch all the reviews on You Tube you can find, but you'll get real world usage experience right here. From people without an agenda.
Some great work knives, HVAC, I've used in the last 3 years are: Spydie Manix 2 s30v, Pac Salt serrated, Native 110v, Para 2 s30v & Benchmade 665 154cm.
Good luck choosing!
Joe