A lot of turntables that come with a cartridge have "throw in" cartridges, but I would not describe the Virtuouso as a "throw in". It's a very capable cartridge. I currently have mine mounted on my souped up Technics SL1200 MK2.
I would go so far as to say that the cartridge is the best thing about that turntable, followed by the tonearm, with the turntable itself being a little on the cheap side.
There isn't much mass to the platter or plinth and the feet aren't that great. The motor can have a tendency to slide around, which will affect speed, or introduce noise if it comes into contact with the plinth. The power button is on the side of the motor, which sits under the table. I'm not sure if the TT15 is the same as the Emotion in this regard, but there are two grounding wires, one that loosely attaches under the center spindle in addition to the tonearm wire. You might not need to use the second wire under the spindle, but if you do it's a little fussy to set up since it connects underneath the table.
I put a thin sheet of sorbothane under the motor to isolate it and keep it from sliding around. If you have a surface where it won't slide around, that may not be necessary. My table came with the Emotion Aluminum Feet (should also work on the TT15), which are very nice.
The only downside about the Virtuouso cartridge is that the cantilever sticks way out in front of the body and is very easy to unintentionally remove. When/if you snap yours off, Andy Kim will replace it with a better one and you'll have an even better cartridge.