What to buy with the machine
The machine itself is only half of the home setup. Comfort is decided by a fan, a mat, a proper cassette and a stable connection.
Minimum set
A cassette for your transmission, axle adapters, a stand for the front wheel, a mat for the machine and a good fan. Without a fan, power training quickly turns into overheating.
For pulse training
A chest heart rate monitor is more useful than an optical watch on your hand: on the machine, hands are often tense, and sweat and vibration impair accuracy. If the machine is able to HRM bridge, it can broadcast the pulse to the application along with the power.
For an apartment
The mat dampens vibrations and saves the floor, but the loudest source is often not the machine, but the chain and transmission. A clean chain, fresh rollers and a smooth cassette do more than a thick carpet.