Strengths: All the key functions of a GPS ? Use of AAA batteries also useful if one is abroad or travelling (and unable to charge from the mains).
Weaknesses: Bit bulky - danger of RSI ?! Batteries also expensive. Also has a nasty habit of 'freezing' (happened twice during races) so maybe a reliability question
Overall: I picked up a new 101 for a fraction of the RRP - seems perfectly adequate for training purposes