While it is always nice to see more applications supporting Asterisk, this dialer is underfeatured and overpriced.

For less than half the asking price you can get Jon's Phone Tool (JPT) which is a dialer that outperforms MacDial hands down in every aspect other than support for the proprietary ISDN telephone sets that MacDial can interface to.

Consequently, if you need support for those ISDN telephone sets this would be the only justification to buy and use MacDial. Then again, if you deploy Asterisk, the chance is you will go for IP telephone sets and move away from proprietary phone technology.

If you are looking for a dialer for Asterisk, then JPT is your choice. While JPT does support many dial methods other than Asterisk, it still outperforms MacDial even if you are looking for a dialer for use with Asterisk only.