Yep, I have the ´25...and I flew with an outfit that used the 45..I prefer the 25, fits better IMO, less pressure on the ears.
I used it on Citations such as C525, C525A, C550, C560 and C650. (I guess the 650 is pretty similar to the 560XL)
I use it on a Challenger 300 now, works great.
I use a VARTA quickcharger with special AA-Size rechargable Batteries, takes just 15 minutes to recharge them. These last about 30 to 40 hours...