Houston, TX: Which is BETTER? : EZ-Tag VS TxTag VS what else?

What toll road system does have a better coverage? And has less problems between other systems?

I was told by the Ft. Bend Tolls operator that the TxTag does not have problems reading other systems and billing each other. Any thoughts?

I am having a BAD experience with EZ-Tag. When I pass fwy-99 tolls (Ft. Bend Tolls) the EZ-Tag does not process Ft.Bend charges and forces me to may them MANUALLY. That is not acceptable, it diminishes the whole idea of a toll-tag/credit card monthly balance service.

Please advise. Thanks.