Indeed, it's a bit pricey. If I was on a PC, I would probably have tried Microsoft ICE, but alas, I'm on a Mac. And for those of us north of the 49th parallel, it was $154 CDN.
PTgui gives me pretty flawless 64 inch by 32 inch pano's from the 34 DNG files from the Mavic Pro, and 68 x18 inch of raw files from my D800 all at 300ppi. It's done in seconds while the latest version of Photoshop chugs away for 20 minutes on my 2013 to present Mac Pro with 32 GB's of RAM. You may wish to try the free trial.
Spent a number of months living and working in the Greenlake area of Seattle, one of my favourite cities. I was especially fond of the pub on the shores of Lake Washington near you as well as a wonderful Italian Market on Federal Way.
Cheers from the beautiful Comox Valley on Vancouver Island...