Does any have experience with reliance in canada...us this as good a deal as it sounds

My AC unit is 29 years old and my furnace is a 23 year old 80% efficiency unit. I know my AC unit has lived it's life twice over and I plan to replace it soon. I saw that reliance has a deal on for a free ac unit when you pay for a furnace and the install for both. Is this really as good a deal as it seems and is it worth replacing the furnace at this time

http://www.reliancehomecomfort.com/Pages/monthly-hvac-offer.aspx

submitted by /u/Awkward-white-guy
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