My advice is the same as it would be for any service contract purchase. Have them give you a complete copy of the actual contract that details what is covered, what isn't covered, what the deductible is and how it's applied (per item, per service visit, etc.). Right off the top, unless something has changed for 2014 the ESP DOES NOT cover everything just like warranty. Things like paint, chrome, etc. are not covered for instance. The actual contract should give you the real scoop, versus the BS you will get from a salesman.
Also, be very aware of the gotcha's. Modifications can void the contract. Use of nonstandard parts can void the contract. There are plenty of people on this and other forums who can tell you how the ESP folks refused to cover repairs due to mods, even when the mods had nothing to do with the failure in question.
Jerry