rx100 case

i know this has been discussed numerous times, but i have not seen a single post mentioning the megagear leather camera case which is essentially the same as the sony leather case. See below.

http://www.amazon.com/MegaGear-Protective-Leather-Camera-DSC-RX100/dp/B008QWEKO6/ref=sr_1_cc_3?s=aps&ie=UTF8&qid=1350929609&sr=1-3-catcorr&keywords=rx100+case

would this be enough to prevent dust from entering the lens? or it's best to settle with a pouch?