"I got this the day it came out , and I'm having a pretty fun time with it! Here are the specs of each main piece in this set:
BRICK: The Brick is a net-down to the EV3 Brick because it only has 6 ports you can connect your motors/sensors with, it does not have a screen where you can test your sensors in real time (without a phone), you can only use the rechargeable battery, no normal AA batteries, so if the rechargeable battery breaks, you need to get a new one, and the Brick is not compatible with the EV3 and EV2. The good things about it is the bluetooth connection to your phone that has the coding app is down to the nanosecond when you are looking at your sensors in real time, the sounds it makes are pretty nice, you can download up to 20 different coding projects onto it, it comes with a rechargeable battery and it is much, much lighter than the EV3 Brick.
MOTORS: I'm pretty sure the motors are as fast as the EV3 ones, and they are rectangular, so you can make easier shapes when you are building them. The HUGE downside is the cord, which is long enough, but if it breaks, you cannot fix it or buy a knew cable like the EV3 cords.
COLOR/DISTANCE SENSOR: The cords are the same thing as the motors, and it is kind of hard to put them on your build because there isn't much connection points on them. The distance sensor can detect anything from about 40cm away, while the color sensor can only detect something from about 14cm away, so it is a small downside when it comes to detection distance. The color sensor can detect quite a bit of colors, more than the EV3 sensor (I think).
LEGO BRICKS: I am glad that there is a lot more Lego bricks than the EV3 set, and there is a wide variety of bricks. You have 6 very sturdy wheels, a big red ball and a small red ball, two white rubber bands, two huge dart launchers, a 11x19 teal technic baseplate, a bunch of gears, some cool stickers, and a lot of white technic coverings, including A LOT of the usual technic peices! Also, the charging cable is not that long, which isn't a big deal in my opinion.
CODING: I love how you can use Python on the EV4, and I love even more the Snap-It coding style that is much better than the different style the EV3 used. There is a wide variety of Snap-it blocks you can use, so you can do whatever you want with your EV4 set!
I would have given this set a 5-star only if the cables on the motors and sensors are basically the same ones used in the EV3 sets."