I ordered the Tifway 419 online (saved 10%), it showed up just after 6pm so I had to quickly get home and get it installed. I had prepared the sod by tilling the soil and adding fertilizer according to their website. I also set the timer per the website recommendation. After a day I had a few yellow spots where it looked like it was getting burned by the sun. Granted, it was over 100° when I installed the sod. I emailed ET and they responded very quickly with a suggestion on changing the timer intervals. Since the change, and somewhat lower temps, the yellow areas are greening up nicely.
Overall I'm pretty satisfied so far.