There's no place in Pittsburgh like Klavon's. Actual Klavon's. Most believe it's not the same since the take over which is a shame, but we're so lucky to have this one still (I say take over, but really this was saved by the current owner). Unfortunately the current set up with the ridiculous amount of odd candy sold here makes it a little cheap. That's the only negative I can find.
A fair warning, Klavon's seems a bit out of the way if you're doing the typical Saturday afternoon in the strip but definitely doable. The ice cream is from PSU which is delicious but the real point is to have one of the sundaes in this 20's shop. Not to sound corny, but it is just uniquely entertaining. Where in the city are you getting hot fudge on some white house? No where. The service was awesome too; we spent a fair bit of time talking with the young man behind the counter about the most popular items (turtle sundae!) and his favorite, a genuine, classic banana split. This isn't a frozen dairy historical society so cut the kids some slack, by the way.
Take the extra few blocks to Klavon's and get the amaretto sundae, two scoops! Add the fudge! And chocolate whipped cream! And cherries! I could go on forever, but you understand. It's worth it.