Maple Treeway is one of my Favorites from MKWii
3DS Rainbow Road is my favorite Rainbow Road from all the games (Followed up in order by: Wii, GCN, N64 and 8)
Peach Gardens looks amazing. A huge 1+ from MKWii and DS.
Boo Lake. Meh. Just like Broken Pier. One of my least favorites in the entire series.
Rock Rock Mountain. Hated it at first but it got my vote over the years.
Berlin Byways is one of my favorites from Tour.
London Loop. Just because of the Big Ben, amazing.
Merry Mountain, A holiday themed course perfect for the upcoming season.
(Reminds me of Rampart Road from Sonic & SEGA All-Stars Racing but with more Christmas lights)
Overal: A solid collection, some fan favorites. 7'5/10 for me.
My bingo card for wave 4-6:
Airship Fortress
Moonview Highway
Mushroom Bridge
Mushroom City
Delfino Square
Figure 8 Circuit
Yoshi Falls
DK Summit (DK Snowboard Cross)
DK Pass
Cheep Cheep Island
Luigi's Mansion
Amsterdam Drift