Moxa NPort 6150/6250

Hi all-
I'm a long time conserver user, and need to replace a failed Cyclades TS400.

The Moxa terminal servers were recommended to me by a colleague (who
does not use it with conserver).  I'm wondering if anybody has
experience using them with conserver?  I'll likely get the 6150 or
6250, since I only need a single port.

I was also looking at the OpenGear ACM5002, if anybody wants to comment on that.

Thanks!
-Joe