I've had my 2-man Eureka Timberline for 18 years and still use it regularly. So when it was time for a family tent, car camping, I didn't hesitate to buy the 4-man Timberline. A bit more than $100, but well worth it.
In college we traveled around the country on a bus for a semester, camping everywhere we went, in 4-man Timberlines. Never had a single problem with any of them. And the school continued to use those tents for many trips after that.
I notice that Sears.com has it for $10 less than campmor.
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Sorry I don't have any experience with that brand you're asking about. My intuition is that they're probably fine for what you have in mind, occational short-term use.
Double-check the construction to make sure you don't have to thread the poles through a sleeve. Set up the tent a couple of times in the backyard for practice before you head out. Seam-seal the tent, and check for missing parts. Being able to set up your tent blindfolded may be overkill, but I end up making camp after dark about 70% of the time (and I
can set up my tent blindfolded).
If your child hasn't gone camping before, you should set up the tent for them to play in for a couple of days. We did that for our 1-year-old. He loved playing in the tent in the house, with his new sleeping bag inside too. I think that helped take the 'edge' off when the real time came.
And after a night in a tent with the old lady and kid, you'll be sorry you didn't buy seperate tents.
Good Luck,
-Bob
p.s. You didn't ask about sleeping bags, but the Eureka Grasshopper is what I bought for the Boy. Very nice bag, warm and well-made, for only $25. No sense in blowing a bunch of money on something they're going to outgrow in five or ten years.