Like Adams, mine is about a 20' range and has been except for when the battery started to die in the key.
It's pretty frustrating to go to lunch with a co-worker who has a Nissan and can unlock his doors and roll down the windows from inside the restaurant while your Porsche doesn't work from two parking spaces away.
I'm going to try the TSB fix to see what kind of additional range I get after I put the water tank in tomorrow and get it running again.
