I've been to Guido's three times for lunch. I've had a burger and fries all three times, all were cooked to perfection and really tasted great. The first time I went alone as I work nearby. I expected the experience to be pleasant, if not speedy, as I was on a short lunch break. For some reason, it took a while to get the burger and fries. The waitress was accommodating and polite, but it took way to long - like 30 minutes before I had the food.
Second and third meals there were all great experiences with less trouble than the first. The burgers are really good and the fries become awesome with the queso added.
Its a decent enough place for lunch. If they sped up the service I would likely eat there more often.