I've had exemplary support from both BlueDo and URC.

I originally purchased an MX-350 and an MRF-250 RF/IR expander for use here in Australia. The MX-350 worked fine in IR mode but the MRF-250 refused to respond at all to RF. I purchased the "supported" 240V to 110V converter for the MRF-250 but still no go. BlueDo exchanged the MRF-250 but still no go. I upgraded the MX-350 to an MX-650 at a very reasonable upgrade price from BlueDo. Still no go.

So I rang URC and talked to a very helpful guy there who suggested a couple of things. Still no go.

I eventually got my soldering iron out and disconnected half the front blaster IR LEDs from the MRF-250 and IT STARTED WORKING! I passed this information back to URC.

Anyway, the assistance from BlueDo and URC was exceptional - even though it was the MRF-250 design that was at fault.