One thing to be aware of is that it is highly uncommon for an "immediate failure". The reg will exhibit symptoms that is is time to consider service. Search here on SB (thinking the DIY section) for the "Regulator Checklist". Get an IP gauge, and learn the basics of checking your regulator. Even if you never intend to service it yourself, understanding the symptoms is good practice. You are not doing yourself any favors (aside from filling the cash register) just doing an annual rebuild by an LDS...
YMMV
YMMV