I used this one and it has been great for small sections and I suspect it’s easier for things like the attachments, but after having completed the bulk of my telkwa (still diagnosing and fixing some leaks), I wouldn’t recommend it. The obvious reason is like you mentioned that it takes longer, but also, I found myself rewelding sections more than what I’m guessing is normal since the small shape just doesn’t cover enough area. Temperature wise though it was great. The only time I didn’t get a good weld due to temperature was when it got turned way down by I’m guessing my kids when it wasn’t in use. It heats up really fast, maybe 2-3 minutes.