Weaknesses: I've had the monitor for about a month, and haven't had any problems with it yet, so no obvious weaknesses that I'm aware of.
Overall: As a starting out runner I decided to buy myself a basic, no frills heart monitor. I didn’t want to pay extra for features that I wouldn’t use, but the one feature I did want was target heart rate zone alarms for upper and lower limits, so that I wouldn’t have to continually look at the reading to see if I was in my target range. Retailing at around £40, the Timex 1440 was the cheapest option I could find which offered this feature. I use the monitor for outdoor running, and also for running on the treadmill. The Timex 1440 is compatible with most gym equipment due to its analogue transmission, and by wearing just the chest strap (or the wrist monitor as well if I want to use the alarm feature), I have a continuous HR reading on the treadmill display. The strap is comfortable with good-sized sensor pads, ensuring adequate contact, and once the monitor settles down (no more than a few seconds after putting it on), there is a continuous, reliable reading. Other features include a stopwatch, daily alarm, time of day, month, day and date, and a night light. It comes with a compact instruction booklet which clearly explains everything you need to know about operating the monitor (but the section on fitness and heart rate zones was a bit too basic to be useful). I found the instructions easy to follow, and had no problem operating any of the features. The Timex 1440 doesn’t do anything fancy, but it does what it sets out to do well, and I would recommend it as an ideal heart rate monitor for anyone starting out, or just wanting the basics.