I recently tried my trial subscription to TerraStar C and was very impressed.  For the amount of use this unit will receive, I'd rather avoid the unlocks and subscription costs if at all possible.  Unfortunately, it seems like WAAS has become very unreliable here since the untimely retirement of PRN 138. For those of you who are using TerraStar L, how do you like the service?  I'm not looking for repeatability but I do want very good pass to pass accuracy.  Thanks.