Pardon me if I am a bit incoherent in my reply below, as I am a bit drunk right now.
You know your friend open new chicken rice store, you go down to support? Same same but different.
TL;DR: A firm believer of BTIR but needed a specific product to cater to my needs/plan, bought it since I am comfortable with the policy's coverage, returns & TDC and at the same time support my IFA whom had been very supportive to me despite me not being a cash cow.
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So background was that I was looking for a product other than saving plans to supplement my retirement during my mid 20s. CPF+private annuity+equities, from lowest risk to highest risk which then CPF(SA)+private annuity will form my "bond". A buy and forget product while I devote more attention to my equities if required, and assume more risk while knowing that there is a safety net for me to fall on to if equities portion fail (worst case scenario).
So I came across private annuity. Made some comparison and found that Manulife was bang for buck at that point of time (I think now NTUC is not bad too). Hit up my IFA and inquire more on it then bought it.
My rationale at that point of time; I do not wish to rely solely on CPF due to the possibility of shifting goalpost and I do not wish to put into SSB as the returns are not attractive. Sure there are other bond instruments (ETF) that can definitely generate higher returns, but I was looking at something similar to CPF annuity and one that can complement alongside it. Hence concluding to a private annuity.
It was a lump sum payment with estimated total returns of >=$100k (conservative/guaranteed estimate) 2-3 decades later. The premium also represents <10% of NW at that point of time, so I was fine with locking it to prevent accidental usage or losses due to dabbling in equities.
With such variables above and I am not looking into VC/top up cash into CPF, thus I took that route.
However, with that being said
I can assure you CPFLIFE is really the best annuity plan you can have. If you have restricted cash flow or am fine with going all out on CPF, do maximize it to the fullest potential. Best bang for bucks.