I am a big fan of workout gadgets. I love having data and numbers with which to rank myself. This is also why I like repeating sets of 100s or 50s in my workouts every time so I can have definitive proof that I'm getting faster in the form of improved times.
I had a Garmin heart rate monitor, which I really liked using until the battery went dead in the watch part. I could replace the battery, I know, but have been lazy about it since the watch didn't really fit me that well. It's a unisex watch, which means the watch face is huge on my wrist and I have to use the very last hole on the strap. Maybe I should get a girly one at some point, but I haven't gotten around to it. Also, since I swim more than anything, and the heart rate monitor isn't waterproof, it has limited utility.
I also have a Fitbit, which I love. I wear it every day, and totally berate myself when I forget to clip it on. Jason has one too and at the end of every day, we compare steps. He always beats me. The advantages of working in a lab versus a desk job. It also has an interactive website where you can review your stats (that automatically upload every time you walk by the little USB base), and also enter in other things you do that aren't picked up by the Fitbit (like swimming).
It's a really fun little gadget. Not only is it tiny and convenient and accurate, but the customer service is great. I clip mine to the center of my bra, which is one of the recommended positions for women since we don't always have pockets to slide the Fitbit into. The only problem is, the repeated stress on the plastic hinge causes the plastic to weaken and eventually fall apart. No worries, says Fitbit customer service. I got my original Fitbit in November 2010, and since then have gotten 2 replacements by simply emailing customer service with a picture of my broken Fitbit, and they've shipped me a new one. I'm not sure if they'll send me a 3rd replacement when my current one wears out, but at this point I will willingly shell out $99 for a new one.
My latest gadget is a swimp3, which I lusted over for a few years until Jason got me one this past Christmas. The only problem is, it's 6 months later and I still haven't used it yet. I've charged it and loaded it with what I think might be good swimming songs. (I have no idea what type of bpm is good for swimming, so I have a range of options.) But my swims lately have been either Masters swims, or swims with friends from Masters, both of which involve talking and interaction and aren't so conducive to being in my own little music world.
I know Jason feels bad that I haven't used it yet and I try to assure him that I love it. I do. I was so amazed that he got it for me. I just need to find the right time to use it. It will get used! Eventually!