The big thing for me is I need it to look nice in my backyard, not thrown together with crap materials. Some of those cheaper alternatives look like they will work, but also do not look as sturdy or nice. I live in a neighborhood where I may have trouble with an association about this, and the better and more professionally built it looks, the better chance I can get away with it. If it looks like a half-ass attempt at a golf cage, it will really attract the ire of the association.
Fortunately, I live on the end next to a forest-greenbelt area with no neighbors that will really notice this, so I might just get away with it. But to be sure, I want it to look appealing and not weak/flimsy and somewhat trashy.
The cheaper units just don't look as nice. Perhaps sportnetting.com has used camera tricks to make their product look more appealing, when it really is not. Before I decide, you can bet I'll be asking sportnetting for many more pics than just the one that is provided with the ad.
The way I look at the price - the club I'm a member at, which is the only close driving range to my home, charges $14 for a bucket of 100 balls. After I hit 100 buckets in my net, I'll have more than paid for the net and cage. I'll still go to the driving range occasionally, but with the net/cage, I can hit in my backyard anytime all the time. I'm grilling out steaks, and I hit 20 or 30. I'm letting the dog out, I hit 10 or 20.
I just see it as something I'll use a TON, and I don't mind doing it right, whatever the cost.
That's just it, though. I want to do it right.