I think I will pick up a set, but not for my high use devices such as flashes. Standard NiMH batteries have more capacity, and will provide more flashes, or camera output over a short use duration.
However these will be very useful in a number of household products like a flashlight, or my portable guitar amp where I don't want to be replacing, or recharging batters as often. I may also use these in a digital camera or two if I'm not shooting a lot.
So from where I sit the downside is that they don't have the capacity of freshly charged NiMH batteries. The upside is that they say they will hold a charge for 6 months or more. This makes them very useful for a lot of things, and they should last longer as well as they are not getting charged as often.
If one recharges them four times a year, and they have 1000 charge cycles, well, you can do the math! You may want to will these to a close relative as they will be around for a long long time.
That's good for the environment as well! Batteries are not generally an environmentally friendly thing to dispose of. That is the real kicker. If I never have to dispose of another set of batteries, IMO that is HUGE!
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