Kreitler rollers are still the best.
Rollers should be operated at speed. Pedal speed. Under a hundred rpm just as well to ride anyone else’s stationary bike. 150 to cool off and 200 plus for sprints is more like it. Everything works better with a fixed gear. Even old timers can do 200. Youngsters should aim for 250.
Riding rollers makes big lagoons of sweat. Put the rollers inside a childs inflatable wading pool. Protect the bike with towels. At minimum expect to clean bike thoroughly afterwards and do some floor damage.
There is better than best if willing to search (or build). Roller races of the past were done on large diameter rollers. Climbing up there is sort of scary, once underway they are phenomenally steady. On a fixed wheel the flywheel effect is just amazing. Suddenly 200rpm is not a peak, once there it can be held and held.