I shoot with RP JrX Studio receivers and an SB-28 on a regular basis. Absolutely no problems whatsoever.
Here's a link to my buddy's blog where he shows you how to craft a hotshoe and/or 3-pin plug so that you can take advantage of the JrX transmitter's adjustment capabilities and control the flash output directly from your camera.
Thanks for the information. The price seems reasonable on the units and I need that capability. The advice and direction on these forums are what keeps me coming back.