Generally speaking, if you have to ask if a transfer bonus is a good deal, then you shouldn’t be speculatively transferring points.
All transferable points are most valuable when they stay as transferable points, as that’s when they have the most potential.
As soon as you transfer to a partner, you are doing so at the opportunity cost of every other transfer partner.
You’ve just severely limited your redemption options.
Keep your points transferable until you have a specific redemption you want to transfer for.
Unless you are a points and miles expert who is extremely experienced in a particular currency that you regularly use for redemptions, do not ever speculatively transfer points just based on a bonus.