We have an Exer Genie at our gym. It's definitely convenient in terms of portability and setting up in a small space. It doesn't quite feel the same as a sled to me, kind of feels more explosive dragging a sled vs the friction of the Exer Genie. But I might just be overly sensitive to these things being a old prima donna Olympic lifter... The Exer Genie does get pretty hot due to the friction, just something to think about if you're using it with groups.