We have a Melbourne. We have (wife and I) spent a 3 month 14000 mile trip to and from Alaska. Numerous multi week trips also.
We have had as much space as we needed for all of these trips and the coach has all we needed to enjoy ourselves.
Yes, outside storage is less than a Class A. We knew that when we traded out 30 foot 5er. Would it be nice to have more basement storage. Yes sometimes, but then that is just more "stuff".
BTW on out Alaska trip we did not tow a car. There were very few times that there was an issue.
I did read one individual suggest a Class B. We looked at those also. Major issue was not its size but the need to set up and take down the bed/dining table, daily.
We felt the Melbourne eliminated that and gave us the space we needed.
It is not a low end, even low middle unit when you compare price, utility value, etc.
JMHO, and has been for 3.5 years now.