I've always had pleasant experiences with Discount Tires. They check and fill my tires with air for free - some places will accept my tip of a couple of dollars, other locations will not.
After doing some research on tires (Costco was more expensive amongst other places) I made an appointment several days ago online to have 2 of my front tires replaced. The next day I received a call from a rep at DT advising me that they didn't have my tires that I wanted in stock, but it was no problem ordering them for me and it'd be there by the time my appointment arrived.
I came at my allotted time and was greeted immediately upon entering. I don't remember my reps name but he was friendly and courteous. He did try to upsell me a few times on things including new tires for my back end but I declined. I can't be annoyed by that as it's part of their job. At the end, I ended up paying what was quoted to me when I did my online appointment. He told me since I made an appointment, it would take them 45 minutes to complete the job.
Out of curiosity and boredom, I decided to time it and see if it really would be 45 minutes. To my pleasant surprise, it was done in less than 37 minutes. The guy who checked me out was also very friendly.
If you are tight on time, I would suggest to make an appointment through their website because they are true to keeping your appointment and getting you out before others who did not have one.
Friendly guys, knowledgeable, professional and they all seem genuinley happy.