I completely disagree. I just bought into a practice that has a cerec; so luckily I don't need to invest in it, but I still would have.
1- you don't need to spend 100K. The previous owner bought it used for 35K
2- you will save a lot of money. My labe fee for PFM is around $100. The cerec block + all associated materials (etch, etc) does not exceed $30. Keep in mind for a conventional PFM you have to add in the costs of a PVS impression, temporary, cement, etc. Those can easily add up to an additional $30.
3- time is a big factor. Only need to see the patient once. Better for you and patinlents love it
the previous owner did hundred in under a year. He tried to show me how to use it and I got a membership to cerecsoctors.com and watched all the videos and it's still difficult to use, so I'm taking a CE course at the sirona facity next weekend (not cheap, 3K). Either way I think it's a great invesment. It's definitely not for all cases; I still won't do it for anterior cases, but is great in many situations.
Omar