Extremely high build quality. It's heavy. Solid. Nothing flexes or bends. The temp displayed is very accurate when referenced with a thermometer. My only complaint is that the 2-piece diffuser should either be standard equipment, or an optional upgrade at order time (in exchange with the stock diffuser). The 2-piece diffuser is a MUST HAVE accessory. Cleaning the firepot is a messy pain the A** without the 2-piece diffuser. I didn't think I would need it, But I ended up ordering it about 6 weeks after receiving my YS640. I also highly recommend the direct grilling grates. I was able to get rid of my gas BBQ because the direct grilling feature works so well on the YS640.
Purchased my grill last fall at Costco, overall it works OK, some meats like Lamb Chops are just delicious. However, customer service seems to be deteriorating as the company is having success. My kids recently purchased me an add on to my Pro 34, a cold smoker. Traeger sells this but does not support it. The installation instructions are incomplete, I was sent parts that do not go with the unit, then customer service couldn't figure it out, this went on for weeks. After getting it installed, I asked for some instructions or recipes on how to use it, there are none. The old cover does not fit now, and Traeger does not sell one to go with a unit with a cold smoker, or plan on doing so. After a web search, I found one at Charbroil that kinda fits. Also, I just saw the same model at Orchard Supply, it now comes with more shelves and upgrades which I now have to buy as extras.
We ended up going with the Memphis Pro. We were fortunate enough to be able to see all of the manufacturers and models I was most interested in, at Sam’s NW BBQ. (Yoder, MAK, Fast Eddy, GMG’s, a few others, and then, the one we ended up with, Memphis.) Sam took a good amount of time, providing us fantastic information about each model. We ended up with the Memphis Pro for the following reasons: 1) The construction, mainly the double-walled construction; 2) the preciseness of temperature, and being able to hold the temperature (due to reason #1); 3) the extreme ease of changing from smoking to grilling without a lot of effort or reconfiguration; 4) the double hoppers; 5) and another BIGGIE, the fact that grilled or baked foods taste like that, and not like smoked cookies, bread, pizza, etc.
With 341 square inches of cooking space and a digital control board that sets the temperature from 180 to 500 degrees, you’ll be cooking whole meals in this grill, even though it’s the smallest model that Pit Boss makes. It will hold up to a dozen burgers for parties, or a chicken and vegetables for the family dinner. When cooking is done, the porcelain coated grill grates are easy to clean.