Neighborhood takeout Thai place that's a convenient location for me, with your usual Thai restaurant standards. Let's call this more of a 3.5-star review.
Madison tends to have lots of restaurants in certain genres that tend to also have similar quality. For example, there's who knows how many Indian places with lunch buffets, junk food takeout Chinese joints, half decent sushi places, etc. Some are better than others but there's not a lot to separate them. That also applies with the Thai restaurants around town. They all make a lot of the same dishes and some do it a little better than others.
Within that group of mostly-similar Thai places, I'd say Thai Basil is pretty good, and is relatively cheap. Not exactly super exciting and different if you've had lots of Thai food, but they do the standards reasonably well.
I will say that sometimes the curries seem to be a lot of sauce with not a ton of meat and veggies, but overall I have no major complaints.