Simple Mobile Data Only Nexus?

Does anyone have any experience with Simple Mobile's data only plans and a Nexus (Galaxy or 4)? Especially in Washington, DC.

http://www.mysimplemobile.com/plans-wireless-broadband-plans.aspx

I'm tempted to get a data only plan and use Google Voice for texting & voicemail and Gmail for calling (or GrooveIP/Talkatone/Spare Phone if on the go).

Okay, I will do it and post the results here. Any advice is appreciated.