I used to thumb my nose at Mossbergs until I had to deal with Remingtons Customer DIS-Service on a lemon 1100 Slug Gun I bought back in '88. It's a long story, back and forth about a half dozen times at my expense, finally sold it at a big loss after them failing to correct the real problem.
Back on topic, In '94 I bought a Mossberg 9200 Slugster Combo that I am very pleased with, shot several deer, turkeys, phesants and other small game with it over the years. I know people that have had the Model 500 for years and they are pleased with them.
I know the Mossbergs are not something that you would want to be shooting skeet every week with, but for a hunting mans gun they are very good value. Mossbergs Customer Service is one of the best I have ever dealt with, and I have dealt with several.
Sure there are much better choices out there, but until you have been in the trenches with a Mossy, I guess you can't appreciate what a great value they really are.
If it fits him better, I say buy it and enjoy it!