Not a great Parker alternative in my experience. The line was too fine and dry.
There really aren't any great Parker-style refills out there if you're looking
for that wet gel / rollerball style. Better to go with a pen that takes an
alternate refill such as Pilot G2 style; then you can use the Pentel Energels. The best ballpoint version of the Parker style is the Schmidt Easy Flow 9000.
The best gel version is Parker's own.