Dioon edule will sucker (see above multiheaded female plant), is relatively easily (for a cycad) propagated and grows strongly and easily. For people looking for a first non C. revoluta it is often the first port of call as a result.
The above picture shows an emerging female cone - Dioon put out huge seed cones which can if properly harvested and treated be used of food (raw, like all cycad parts, they will be very toxic indeed).
One of the really cool things about D. edule is that plants are in the cycad trade from a number of locations and these locations show different colourations and habits. I don't know the provenance of the above multi-headed plant but note it shows an attractive blue sheen. Some locations show other variations (a gold-green, a purplish-green, a certain leaf shape) which make them distinctive and more collectable still whilst retaining D. edule's general easiness to grow. Enthusiasts have even been known to tour mexico to visit the various Dioon species and D. edule localities