You would be surprised how fast you can rack up minutes (and FEES) if you use your phone for personal and business calls. I've had a 3000 minute plan since 2002-2003 because I started up a few businesses and during busy months I would average 2200-2800 minutes, slow months 1500-2000 minutes. So unlimited plans are great.
Also consider many people now do not have landlines- so this plan is great. Im curious about additional charges such as long distance, roaming, international calls- etc.