My husband has wanted a real charcoal grill for quite some time now. When we first moved into our house, his mother got us a cheap grill from Walmart (I think it was $10), but it became rusty and rickety within two years. We had a cover for it, but the bottoms of the legs still rusted, presumably from small piles of snow. Once we freecycled it, we felt ok about making a new purchase.
I have to admit that my husband did all the decision making for this one. I know that Weber is a good name for grilling, but that is about it. I know that he chose the 22.5 inch grill compared to the 18.5 inch because he wanted the larger grilling area, and felt that the $20 difference in price was worth it. When he grills, he makes enough for a couple of meals, and he is definitely happy with having the extra space.
There is also a gold model to the charcoal grills. For the 22.5 inch, the gold model is $140. The main difference, from what we can tell, is that there is a better ash catcher on it. My husband looked over both models in the store, and wasn't willing to pay the extra money for this small feature.
Overall, he has been really happy with this grill so far. He cooks out every weekend, and has no complaints. At some point, he would like to get a small table that attaches to the grill so that he has room for tongs and sauces, but that is about the only drawback he can think of.
I can say that the food tastes really good, and I think that we got a grill that will last us for a very long time.