Guys, I need some info...

I recently installed a new Linux server for a accountant, in order for his assistant to be able to work remotely due to illness.

VPN has been set up, and it takes her all of 3 seconds to dial in over 3G/HSDPA and she's logged onto the network...

Problem is that Pastel(which they are using) is a pain in the butt over the VPN and bombs out because of latency on the network...

He has asked me to investigate the possible use of Quickbooks in order for them to continue working remotely... My question is this: Does anyone of you use Quickbooks remotely over VPN and what are the speeds like?