I'll simply say that I am a huge fan of Melt. The food is consistently good (although the portions are insane, so be prepared to take home leftovers), and the beer list is always interesting (good amount of both draft and bottle choices). The service also has always been terrific and have never had a negative experience from any of the servers or bartenders. What makes Melt truly special is that they can make essentially any sandwich vegetarian or vegan. They have a few vegan cheese options and have plenty of non-meat alternatives to choose from (even though their tofu is pretty darn good too). Of course, they have plenty of meat choices too, which makes Melt a perfect place for groups that have a range of dietary preferences.
They also have a build-your-own style sandwich option, if you want to keep your grilled cheese more simple. Sure, sometimes the wait can be a tad long, but the space is pretty big and I have never had to wait more than 20-30 minutes for a table. There also is plenty of seating at the bar, where it is easy to order food as well. All in all, a fun take on comfort food in Cleveland.