In reply to SamSimpson:
I bought a wheel-on fluid trainer at the start of British lock down, just when there was a threat of moving to something more restrictive (as in France). There really wasn't much available even then, so I had little choice. To be honest I didn't do much research, but just got what I could get hold of. Its a Kurt Kinetic "Rock and Roll" Smart and if I had the choice again, for the same money, I would probably buy the same thing. Its a "one-way" smart trainer so the load isn't controlled by an app, but by me by increasing cadence and changing gears. Power and cadence data is sent from the trainer to my laptop and The Sufferfest app though. I use a heart rate chest strap that I had already with an ANT dongle which sends its data independently to Sufferfest.
The trainer is big and bulky and not very portable, which is fine for my needs, but obviously won't be suitable for everybody. Its quiet for a wheel-on trainer and the rock and roll aspect does make the ride sensation feel very like being on the road. If I was interested (I can't decide if I am or not!) then its possible to swap out the roller and resistance unit to an electric one that will then make the trainer fully smart - 2 way.
As its not really a proper smart trainer, i have to change gears and try to hit and maintain the power targets set by Sufferfest (there's no ERG mode possible, which would force you to hit a certain power), which is both good and bad I think. It definitely gives a mental stimulus at higher power levels but when your eyeballs are popping it can be quite hard to maintain. I find this can be difficult for the intervals which are some way above FTP and which are more than 4-5 minutes long. Perhaps not using ERG mode makes the workouts both slightly easier and harder than if I was using ERG. Accuracy, as with all wheel-on trainers, isn't as good as a wheel-off trainer but plenty good enough for me for use with Sufferfest - I think its quoted as +/-3%, but you need to make sure the bike is set up consistently on the trainer and carry out a spin-down calibration regularly. I've not had a problem with tyre wear, though I do use a proper trainer tyre on a dedicated wheel (a cheap budget thing).
Post edited at 09:40