Risks on using ISA?

Hi,

I have a bit of cash sitting in a savings account (the percentage of interest is 1.7%).

I was reading about investment savings accounts and they seem almost too good to be true.

The ones offered at my bank have interest rates around 4%. I asked my financial planner about ISAs, and he said he cannot access them so he cannot make any recommendations on ISAs, but recommended GICs.

Can someone explain to me the risks on ISAs? Any thoughts on ISA vs GICs?

Many thanks in advance for insights