I work in a bike shop, been doing it on and off full-time/part-time since 1982. Been riding rollers since 1982, also have used mag trainers and fluid trainers. Now I have a Wahoo. The thing feels very much like rollers, which feel much like cruising on a flat road.

With rollers I select a gear and cruise, or select a higher gear to push a little bit, lower gear to rest. They really help with my spin for some reason whereas the traditional trainer does not. Rollers are a lot of fun, require that the user pay attention, and improve balance quite a bit. With resistance trainers there is always a flat spot regardless of the flywheel weight. Obviously the heavier the flywheel, the less noticeable it is, but it is always there.

Enter Wahoo. Take the best of rollers and combine with resistance and you get a freakishly realistic ride. Don't know how they do it, but it works. Do not use Zwift or anything like it as the cost is prohibitive on a bike shop income, so I ride with videos of the great classics and cruise with the leaders and accelerate with them. Acceleration really is a good mimic of real life and is what convinced me that this is a very useful tool for racers, egotists such as myself that like to push themselves once in a while, or just a person that wants to maintain fitness and feel like they are riding for real. Love it!