I have the Tacx Galaxia rollers and absolutely love them. I've done dozens of 2 hour sessions on them and it's been so beneficial. I have also done YouTube interval training videos.

Any and all rollers can take some time to get used to the balance when you first start out. Some take longer to get used to it than others. Luckily it didn't take long for me and I was able to transition well. I can easily write emails or surf the Web/social media and spinning with no hands for a long period of time. The galaxia rollers have the rocking bottoms on it which really do help take away the inertia. I can sprint out of the saddle at almost 70-80% power.

I've had a trainer before also and HATE it. SOOO boring!!! Rollers give such a nicer, road - like feel instead of being locked into a stationary position.