I'm on the verge of pulling the trigger for this. The main selling point is the Mega/Sega CD and the SVP support.
How good is the CD support? Is it compatible in the sense of "all games work 100% no questions asked" or is it compatible as in "some games may work but most won't and expect bugs and glitches"?
I've been using an Everdrive MD v3 for the last five years and instant loading and unlimited lifespan are both no brainer upgrades from the MD v3. It's just a question of whether the Pro is worth the extra £100 from the Mega Everdrive X5. I don't think I can justify the £100 for only SVP but if the Pro can open up the Mega CD for me then I really can't justify not buying the Pro.