I personally own two slings...and have used them off and on. There are times that they come in very handy, and some other times, I feel like it is more of a hassle.
I recently found Ruby Toots. They sell slings that are much less expensive than the other ones out there. I have heard raving reviews about them, so it might be worth a shot!
You can get the clearanced slings for less than $20 a piece...and even at full price, it's less than other leading slings.
I may just have to get one...
Aren't they cute?