It is much better - seems to me - to train QRQ 40 wpm (or lower speed) with ARRL exercises, regularly refreshed and archived at http://www.arrl.org/40-wpm-code-archive
You get plain text at known speed, and are not dependent on some blue racer with a distorted fist that is just not present at the time you want to exercise in the lower part of the band and above that: is generally nor chewing the rag but making rubber stamp QSO's. or even worse cq-test 5nn tu
After all: When you passed away, all your proficiency is gone, be realistic it will be the near future, so better design and construct your own transmitter and receiver instead of buying commercial equipment. May be it still works for years after your SK. And the purpose of amateur radio service is not just making QSO's with commercial equipment, I thought.