I started using an
ECV at WDW by renting one at the parks. I rented from Disney for about four trips. Now I rent successfully form Walker Mobility. However, renting from Disney presented a few "issues:"
*no guarantee the park will have an ECV regardless of time of day - I was at EPCOT Mother's Day 2002 a half hour after the park opened & no
ECVs available at either entrance; a weekday in early December the Studios had no ECVs available in the afternoon.
*if you want to park hop there is no guarantee of an ECV at the second park;
*four wheels on a Disney ECV vs. three on off site one (at least the ones I have rented from Walker); three wheels gave me a better turning radius;
*battery holds up a whole lot better on the rented ECV vs. the Disney one; I can tell you where in each of the four parks where my Disney ECV "died;"
*if you rent an ECV you will have it every where you want it - the parks, Downtown Disney, other resorts, non-Disney parks, etc.
The last several trips I have rented from Walker Mobility & had a very good experience. The ECV has been delivered in a timely manner; the battery has lasted all day & night; the cost is similar to Disney & I have the ECV more than just in the parks; etc.
On my last trip we stayed at OKW & I used the busses to the parks. I was hesitant, but the bus drivers were so friendly & very helpful.