We have been using Axium for 5 years. We still have yet to optimize its operation.
Why are you considering a switch.
The deltek continuing support price keeps going up and up. If you want to tweek anything within the system, you have to shell out big $$ for 'customization'. We viewed the axium option, seems pretty easy, and the price is good. There are a few drawbacks with axium that i see (automatic job #'s & data merge for proposals).