Eliptical vs Tread Mill

We have had a tread mill for maybe 5 years. Until the beginning of this year, I have never really used it very often. My husband, however found it boring so he talked to his brother who was saying how boring his eliptical machine had become. Lo and behold, I get home from work last night and they had switched machines!!! (not a bad idead if you really think about it)

Now, I have never really used an elipitcal machine but thought if I have been able to do intervals for 30-45 minutes on the treadmill, this won't be so hard...WOW, WRONG ANSWER!
I got the work out of my short excercising life! And it felt GOOD!

I guess when we get bored with this and my brother in law gets bored with the treadmill, we may switch again but I do think I will miss this more...I mean, once I can walk again!