He's definitely a proven talent in the EPL. With other non-Brits, it would be a gamble. There are many talented strikers who had found it difficult to adapt to the EPL - Morrientes, Borghetti etc.
If he's available, his past record makes him a safe buy, only his off-field problems and the influence of his pesky brothers are a big unsettling problem. At around the touted 8 million pounds, he may be too big a gamble because historically, he can't hapilly stay put at a club for more than 2 seasons. The, his pig-headed brother would have convinced him that another "great club" wants him and he'd be unsettled and start to sulk.