Is it OK to install APC on Plesk?

[DevServe]

I run vBulletin, and one of their techs recommended I not run Ioncube, and run APC instead.

I asked my server company and they mentioned that:

1) They recommend that I find an RPM of APC, if they want me to install it.

2) It might not be wise to remove Ioncube as it could cause issues with the Plesk CP.

I heard that IonCube is only used for SiteBuilder in Plesk -- something I don't use.

My question is, who is running APC on a Plesk (with Virtuozzo)? Did you remove IonCube? Did that cause any issues? Was it worth it? Did you build APC or grab a RPM? (If you used an RPM, do you have the link handy?)

Thanks for any help on this!

Carlos