I thought that they may charge me for booking the flight by phone...I guess with a voucher they don't charge you.
I did sit on hold for 25 minutes after speaking with an agent for 10 minutes booking our flights for this summer. She put me on hold for 25 minutes - never came back to check on me or let me know what was going on... so after waiting that long, I finally hung up (figured I was in the loop and the call was lost

).
So then I spent another 25 min. with another agent and asked her to come back and check on me every 3-5 minutes so I know they didn't lose the call. (You would think you wouldn't have to ask!

)
Apparently they had an issue with the vouchers. The amount of the flight came up one price and then when they aded the vouchers the price jumped up by $50. The first agent put my flight on "hold" and the second agent tried to pick it up but something else went wrong. So she had to book the entire trip again.
They finally straightened it out and I have my voucher flights booked for this summer in MYR! I guess its worth the hassle to get $200 off the flight (for two).