I've always been mildly interested in this game up until its release, given that this is a Lego game that isn't based off a movie franchise, like most are. Instead, Lego City Undercover is, obviously, based off of the Lego City brand. I thought the idea was pretty neat and after completing the main storyline, I have to say, I'm pretty impressed.The main storyline is very well written. It's funny, very slapstick, and, most importantly, lengthy (it took me approximately 15-16 hours). As you progress through the game, you control Chase McCain, a Lego City cop returning from exile, something that was not explained in the game but was most likely revealed in the 3DS prequel. Chase learns that the mass criminal Rex Fury has escaped from prison, and he must traverse around Lego City, finding many new disguises that each have unique abilities to aid him in his journey to capture the escapee. The interaction between the characters is excellent and you can tell that there is a definite sense of distaste between Chase and Police Chief Dunby. The voice acting is, for the most part, very good, but there are some parts that are rather cheesy. There are plenty of hilarious references throughout the game (the construction worker's "Get him to the chopper!" was one of my favorites) that will make you smile and remember the good 'ole times.The GamePad integration is rather unique to this game. The GamePad serves as Chase's communicator, which he uses to communicate with various people throughout the game. You can also use the GamePad to take pictures of crime in action, you can use it to find hidden objects, you can use it to pinpoint suspects, and you can use it to eavesdrop on private conversations. This is perhaps one of the only games on Wii U right now that truly makes good use of the GamePad.Nintendo and Tt Games markets Lego City Undercover as an open-world game, and it is. Even if you have a mission to do, you don't necessarily have to follow it until a special assignment starts. You're free to wander anywhere in the city, and trust me, the world truly is massive.The game is also extremely lengthy. As I mentioned earlier, the main storyline takes 15-16 hours to complete, but then there's all the collectibles. This game is FULL of collectibles. If you push for 100% completion in video games, this one is going to take a while.The graphics for this game are very good. The HD looks great and the frame rate is, for the most part, consistent, with only a few minor instances when the frame rate lags. The music for the game is actually exceptionally good. In the beginning, it may seem mediocre and not that great, but as you progress through the game, the music gradually gets better until you reach the all-out epic final theme in the game.Lego City Undercover is not a multiplayer game. To some people this will be an issue, but it isn't to me. I've always ventured through Lego games alone so the lack of multiplayer doesn't really affect me too much.Now there has been many complaints about Lego City Undercover having long loading times. I thought that everyone was over-exaggerating the loading times. But, to be honest, they weren't. The loading times for this game are dreadfully long. Once you select your file, it takes at least 60 seconds to load the game to where you left off. It takes an additional 45 seconds just to enter the police station, which is just plain ridiculous. The loading times were NOT (I repeat, NOT) fixed with the Wii U system update that went live on April 25th. That update only improved the console's loading times and did not improve in-game loading times. In-game loading times can only be fixed by the game developers. Hopefully Tt Games is working on a fix for loading times.All in all, Lego City Undercover is an excellent Lego game that thoroughly impressed me. This is perhaps my favorite Lego game ever and it is very lengthy (I'm at 17 hours of gameplay and so far I'm only 20% through). It's very fun, comedic, and has a great sense of exploration. Lego City Undercover is a must have if you are a Wii U owner looking for a good game that will last a while.