We recommend the screw-in legs if you plan to keep your bellicon set up and standing when not in use. If you have the space, it is always best to put the bellicon in a place where it is ready to use and very visible. This will help to encourage you to use it often. Remember: out of sight, out of mind!
The fold-up legs are very convenient because they allow you to store away your bellicon quickly and easily. The folding leg feature is especially important if you plan to store your bellicon when it is not in use.
Both type of legs are equally durable/sturdy and carry the same (lifetime) warranty.