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, Alum FW, HawkPS Brake Pads, EBC Rotors, Torsen Differential, Tom's Tune, Rear Tranny Mount, FRSTS, Lunch Box Delete, MSD Coilpack, Massive Wires, Massive Strut Tower, TS Mani, TB, Cam tuning, and Cat Cam.