Class B and B Plus info needed

We are researching Class B's and B-Plus for a future purchase. Model 213 Trail-lite B's have caught our attention but don't know too much about them. Is there anyone out there who has one and could give me any info on them, i.e. gas mileage, quality of construction, features? If you have had one but got rid of it, please let me know the reason for your trade in. Any info would be appreciated.