Thanks all. I know there are lots of brands/types on the market but I also know the quality is tremendously variable - I read one review in which the user said they would last a lifetime, as the sound quality was so poor you'd only them once

. This is why I thought I'd see if anyone had any actual experience of a particularly good version.
Brocker - thanks for the info but Argos have about 16 different versions and I wondered if you happen to recall the brand/model you've used at work?
Honeybee - thank you also. Whilst the idea of playing at being Spiderman certainly appeals I'm not sure that I still have the figure for a one-piece skin tight lycra outfit
genuinita - thanks again. I've seen the model you refer to and they certainly do look a well engineered and robust bit of kit but I don't know about their sound/reception quality. Glad to hear you've used a similar version and I presume their performance was OK?
nightshade - thanks - yes I've been to Maplins but the salesman wasn't too keen on letting me take one a mile or so from the shop to test the performance
ron1863 - thanks for the info. I'm told that rechargeable batteries are an essential feature but that even the best last only about 16 - 20 hours before needing a re-charge.
If anyone else has used a particularly good brand/type I'd be grateful to hear about it.
Jeff