I picked up a PartyQ today for my XL. I wasn't sure how well it would work as my dealer said 5 CFM was a bit small for the XL. I decided to try it based on some prior postings here. I got the temp dialed in first then put the PartyQ on. I have the DFMT set as can be seen in the pic here and once I figured that out its keeping it right at 215* grid temp. I chose 215* as that has always been tough for me to hold that low manually.
We ended up back home much earlier than planned as our oldest (11 years) isn't feeling well. So I probably wouldn't have needed it for this cook. But between this and the Maverick to wake me if needed I'm looking forward to a good sleep.
Oh, there's a 10lb butt in there.