Just remember should you use the RHW, it only replaces the tire at a prorated price(plus the extra money that you will kick in), not the installation fees(new stems, mounting/balancing, tire disposal if applicable). If your buying a new tire, many of the installation fees are included or will be waved but, if it's a warranty replacement then, you pay.
To change the subject a bit...When I was very young, I purchaced a new car battery. In a year or two that battery was shot. I took the battery back to the auto parts store where I bought it and they gave me another battery under the Pro-rating. For the money that I paid in difference for the battery under the Pro-rated warranty I could have just about purchaced a new battery all together, considering that the battery I had received under warranty only finished out the old battery's warranty which was in about 2 weeks.
When buying an item, you pay the store price(somewhat discounted)but, when using the warranty, especially if it's a Pro-Rated Warranty then, that item is prorated at the MSRP.
All Im saying is; read very carefully the warranty terms because most of the time they're not worth the paper they're written on unless you use them sooner after your purchace rather than later.
I do agree with GMGuy that if you live and drive in a construction zone or have had many bad experiences in the past or the tires are very expencive high end tires then, buy some peace of mind and get the RHW.