I have a very basic mag trainer, and a better quality fluid trainer. They are both fine for getting in pedaling time. The fluid trainer, IMO, is more like actually spinning on a bike, on the road. I boughtt it from a steep clearance sale. I never would have paid the msrp $270.
I have had the mag trainer for many years, a friend is presently using it to train for a tri race in May. He says it is fine for his need and use.