Ok, Ya I was looking at the dir-655 emulator just a few minutes ago..seems like its not very user friendly.
I see there are some issues with it in that forum but nothing related to UI operations.
Here's a good rule of thumb I try to uphold when working with any piece of HW, Electronic or non. "if it works, don't fix it!" Always try the units that are already loaded and make sure it works right out of the box. Always. If there seems to be a problem, upgrading to the latest and greatest may not always fix the issue and leaving the real issue still to be fixed. (These units work great on any FW version they released save one. V1.21 had been known to be buggy for some of us that tried it. That's not saying that not everyone saw the same issue for this version. Some people on here have it loaded are are having great experiences with it.)
Always troubleshoot the issue until all resources have been exhausted with FW that comes loaded in the box. If at that point the issue hasn't been resolved, then review the details of FW updates and apply them and then test the results again. If at that point the issue hasn't been resolve then there might be due cause for calling up CS and asking for and RMA.
There is always the possibility that there are lemons out there. However going through some troubleshooting to figure out if it is needs to be done is key first. Why I'm getting my friends returned RMA 4500 from him and see whats going on with it and to test on a different ISP network system. Were looking to see if his issue travels or not. This is apart of troubleshooting.
I've talked to some people about our issues and the majority of the time issues stem from user configurations and setup. The rest and seem to be a small part and agree with you to a point that there are some HW failures on this unit.
BTW, Vancouver B.C? Was curious, I'm headed to Victoria B.C. for the holidays.