Spreads

My broker alpari uk are changing the terms and conditions to allow them to trade variable spreads rather than fixed spreads, im wondering if people who trade with variable spread brokers could give me a little insight to whats it like trading that way.

i have only ever traded fixed spreads and although i could change broker i think all brokers are going to go that way in the end anyway (the decent ones anyway) so i trying to get a idea if this is going to mess my stratergy up in anyway

i trade GBP/USD and GBP/JPY can you tell me whats the max spread you have seen on these currency’s

THANK ALL