A Lasting Power of Attorney (LPA) and Will serve different purposes.
Essentially, LPA will only be effective only upon the Donor losing his or her mental capacity, and will lose its effectiveness upon one’s death.
A Will on the other hand is only effective upon the Testator’s (the one making the Will) death.
LPA and Will are strictly voluntary, and you can do either or both. However, in our humble opinion, it is good to have both LPA and Will.