It all depends on your priorities, your attitude to investment risk, the size of your pension fund and your other assets.
Is it likely that you may never need to draw benefits from this pension fund? Are you therefore looking to maximise the death benefits to pass on to your family? Are you looking for the potential for investment growth, but don't want to risk the value of your pension fund falling?
Only you and your IFA know what you are trying to achieve so it is unfair for anyone else to comment on it's suitability without knowing your personal situation
Metlife is a niche product and has its place in certain circumstances; particularly for more cautious individuals who would prefer the comfort of some sort of guarantee. I agree that the charges look high, but nothing in life is free - guarantees cost money. The shorter the term the investment, the higher the cost of the guarantee.
All of Metlife's literature, charges and videos can be found on the following link.
http://www.metlife.co.uk..._retirement_rp#overview I suggest that you do some homework and familiarise yourself with the Metlife product. Decide whether it's what you are looking for and then discuss at great length with your IFA. Also clarify what your IFA is charging you. Is he fee based or is he taking maximum commission? Are you fully aware of all the charges you are paying for the investments in your current SIPP arrangement? Some managed investment funds have TERs approaching 3%