Do try kmw. I don't put any sugar in as I buy strawbs from the farm here and wash and freeze them whole (don't even take the green tops off, once it is all blended - no body can see the extra goodness!) They are sweet enough as it is.
Mango is the same, I just get them good and ripe, take the cheeks off, de-skin them and freeze as well.
Then I have fruit ready to go all year round.
Haven't tried any other fruit, (only because these are the faves in the house) but fruit in season and ripe - maybe even a bit over ripe and it is all sweet and yummy!