||Losi really did a great job with this new radio tray design. I really like having both servos up and away from the heat and noise of the engine. The radio switch (should you choose to install one, they include a cover for the spot if you don't) has been moved all the way to the back of the tray, making it easy to reach a finger into the body to turn it on and off. It came with almost every piece needed to get all set up in case you happened to lose (or break) any parts from your old radio tray, more on what its missing below. Aside from the steering servo horn and the electronics themselves all the screws needed for mounting and assembly are included, with the exception of the set screw for the antenna. They were even kind enough to include a small tube of thread locking compound. For those having trouble fitting servos the manual has a pretty explicit guide in it as to what servos will fit, and what spacers you will need (several thicknesses are included). In my case I use Hi-Tec servos and they fit perfectly.
Now then, some of the cons, and there are a few of them.
My biggest gripe with this tray: The battery door is VERY hard to get on and off with this tray revision, it no longer has pegs you can use body clips with like the GenII. Instead it uses two hex screws to hold the cover down. These screws, and the right hand lip of the cover just so happen to be DIRECTLY below the throttle linkage making it very awkward to take off and put on if you don't have a setup for charging your RX batteries while they are still in the car.
Other problems you might run into:
-No servo horn spacers (inserts) are included, they do include a horn for the throttle servo but you need the Losi spacers to get it to fit properly.
-For those users with the Spektrum SR3300T you may find that the engine temperature probe is a bit short, you will likely need to install it on the engine then plug it in.
-The mounting point for the antenna tube has been moved back slightly (about 1.5 inches), you will need to drill another hole in your body for it to fit (8ight buggy users).
-There isn't a lot of extra space in the receiver compartment for extra wires or a transponder, the battery compartment is quite roomy though.
Overall this seems like a pretty major improvement over the Gen II and even with the awkward battery tray I still prefer it over the Gen II. The weight shift will be noticeable to more serious racers. 4 out of 5 stars with the missing one being for that annoying battery cover.