These have plenty of features to justify their price tag. Most obvious is the variable resistance that offers three levels of load. Level two feels very similar to riding on a flat road with a light headwind and is suitable for most interval, tempo and steady pace sessions.
You obviously can’t create enough resistance for serious hill, strength or power work, but that’s a downside of all rollers.
The large plastic drums give a smooth ride, and the defined outer lip stops the wheels from straying off the roller to inspire confidence in the novice rollers rider. You’re quite high off the ground but the frame has a handy step.
The downsides are they occupy a lot of space when extended, don’t fold up as neatly as the other rollers and tip the scales at a weighty 8.7kg.