Rena Mach 5 and inkjet envelopes

I have been holding off the memjet bandwagon mainly due to smearing issues, Relyco is saying they now have an inkjet envelope that will solve this issue, has anyone tried it and have an opinion on it?

Relyco Business Solutions - DURASEAL Envelopes for Inkjet Printers

Also curious to see if you ran that inkjet envelope on your inserter and had any issues.

Thanks!