Has anyone use this type of runflat option by a company call Tyron
Web link Tyron Automotive

Testing - Evasive & Defensive, VIP Driving

My local Michelin tire shop claim this is good replacement for the BMW stock runflat tire, which is more expensive and tougher road feel and noisier.
Anyone out here tried this product alreay, just like to know how it peforms..

Thanks