Yes it is worth it, no it isn't HARD persay. But I never installed one the process seems easy. Depends on if its the whole mount or just insert, you need a vice if you're just doing a massive upgrade. Correct me if I'm wrong but you just have to lift the engine/trans high enough to undo it get it out and put new part or unit in.
CM Stage 3+,HawkPS , EBC Rotors, Torsen LSD, Tom's Tune, VF Mount, FRSTS, MSD Coilpack, Massive Wires, Massive Strut Tower, TSM, CF70mmTB, and Cat Cam.