As mentioned above check the conditions of your offer. If it includes a Koodo credit to cover costs & lost pre-paid plans then you'll have to decide if it's enough for you to consider the move. It is very unlikely you'd get any refund for unused time at PM as it's a pre-paid service.
I moved one of our 2 accounts from PM to Koodo during the last offer. I did wait until near the end of the offer in order to maximize using the PM i had pre-paid for plus there was a $100 credit for moving which covered lost time & any costs at Koodo (can't recall if I had to pay for the SIM).
You might also want to look at the plan costs and whether they meet your needs.
There's no point in paying extra if you're not gonna use it.
PM: lots of fairly inexpensive plans, pre-paid so use it up & it stops -no surprises, USA add-ons are cheaper than Koodo.
Koodo: the transfer plans have been quite good offers, discounts on phones, great customer service. The USA roaming is a per day charge but the advantage is that there's no charge until you use it (so there if you need it).
