Fed Wires & Summit

For those people having the pleasure of using Summit as their core processor & transmit wires through the Fed, have you implemented WireXchange?  For those who have, I'd like to know if you've noted any security weaknesses with FISERV's application to automate the wire requesting process.  We have & it seems to have streamlined the process for my Accounting department who transmits the wires, but I'm just wondering at what cost.  Thanks ~ Ana