Summary: I really liked my Garmin - for as long as it lasted. I paid $159 in October 2009, so I got 2 years out of it. During that time, I had about 4-5 incidents where the watch apparently just shut off in the middle of a run. Yes, it was fully charged and I could never find a reason for the malfunction. Another problem was that the chest strap was way too big for a petite woman.
Summary: This is my third Garmin Forerunner. The first two, 201 and 301 are very similar to the 305, so I really did not review any of the instructions for this device. My biggest complaint with this is that I do not feel it is made for a woman. The 305 has a watch like strap, with notches that secure the Forerunner to the wrist. I have to wear it on the second to tightest notch to keep it secure and because of the design, it digs right into my wristbone.
Summary: I bought this unit primarily to use on hiking trails but found that its GPS is not well suited to that task. Seems like it might be handy otherwise although I found it a bit hard to navigate and it didn't seem able to calucalte the calories which was my number 2 priority. I suggest calling the manufacturer first to discuss your needs as the specs don't really address this issue. When calling Garmin, be prepared to wait at least 1/2 hour for service.