In this age of smartphones I have tried them all - own a Samsung GS2, use a company blackberry (on 3rd one), tried a mates Iphone, but I use one of these as my own main phone for ringing business contacts, friends, and family. It's small and rugged, survived being dropped in hot tea, had a decent camera with coated optics which does panoramic shots, and has simple easy access menu options. It's small and compact, and the battery lasts well over a day so you can get through a business day of reasonable use and get home to recharge it without running out of power in the meantime. It charges up from dead to full in 15 mins with the supplied charger.
The only problem is the achilles heel of Nokia phones, the symbian OS. Web browsing is limited, but I can still use facebook in a basic fashion, browse for train times and do phone banking. Meanwhile my Samsung GS2 has a flat battery in a few hours of heavy use, and my company blackberry is useless save for doing emails!