I loved the original Luigi's Mansion and looked forward to playing this, while I didn't hate it I would say this game is not good for renting as it is slow to start and takes time to get anywhere. I also don't like that you can only save by finishing an area rather then using a save point.
I found this played the same, if not better than the GC version. With lots of hidden treasures, cool ghost concepts, and nifty graphics for a 3DS, dude its a solid ghost busting title with fun factor in the above average range. Rent it, love it, buy it. Thanks for your time. Game on!