I have 3, one personal ISA and 2 x junior ISA's. Am invested in Lifestrategy funds which, as an example, have provided approx 10% returns over the last 12 months. I'm not complaining, these are long term viewed set and forget investments with monthly regular top ups. The accounts are easy to set up, administer and trade through.
I'm still waiting for their SIPP to be launched which, when available, i'll make a significant contribution to as i consolidate some of my pension holdings.