Great size and sound
These are a really good size and sound amazing. I work with special needs groups, nurseries and the elderly. No-one has a problem holding onto them. The first time I show these, there's loads of ooh's and aah's, everyone is desperate to have a go.
Don't drop them
The beautiful sound they make lasts, as long as you don't drop them. I've had mine for three years now and they've been heavily mistreated so I suppose I should have expected some damage. The larger ones tend to loose their brightness (sound - not sight) first.
Don't poke around
Also if you're sharing these around, there's an important piece of 'foam' in the base that helps with the resonance. Newbies will always want to give this a poke - they are quite easily displaced and lost.
Love them and your love for them with last
If you're buying these for yourself - I'm sure they'll last just fine! My music equipment is very heavily used.