Packaging, Weight, Cable, and Feet
Aside from the mouse, one finds two interchangeable back pieces, two interchangeable side pieces, several stickers, and a quick start guide in the all-plastic box.
My scale shows around 135 g (+/- 1 g) without any of the weights installed. Each weighs about 5.5 g, so with all three weights installed, the total weight comes out to 152 g. Some parts, including the bottom plate, are made out of metal, so seeing this sort of weight is not surprising. The weight can be increased even further by adding some of the interchangeable parts. Personally, I don't see the point in making an already heavy mouse even heavier. Still, for those fond of heavy mice, the option is there.
The R.A.T. 8+ ADV features a regular braided cable. Though not ultra-stiff, it's far from flexible and definitely irritating unless used in a mouse bungee. The off-centered placement can be off-putting, too. Its measured length is 1.80 m. The cable has a gold-plated USB connector.
The feet on the R.A.T. 8+ ADV are regular black-dyed PTFE (Teflon) feet. Glide is perfectly fine.