I have gone back through 3 or 4 pages of posts and haven't seen this really covered yet so I thought I would ask it here.
I have never really been all that interested in geo-tagging my images, but that has been changing lately, especially with the new mapping support in LR4. My biggest problem is with the cost of the GP-1 and GP-1a modules. Seems crazy expensive for a GPS receiver.
Doing a little googling and I see at least a few options out there that are sub-$100 units but it is pretty hard to find any reviews of them. Surely someone here has some real world experience with these 3rd party modules and I would love some recommendations and feedback.