Nursing bra question? (Not nursing)

I saw these for super cheap with pretty good reviews on walmarts website! I'm thinking of giving them a try.. Their reviews are great; my only problem is I was told not to get them because I was told they can possibly unhook a lot during the day or in my sleep, etc. I'm also not breast feeding. I was told to get something with support. I just need something to bring to the hospital with me and for comfort considering all of my bras either are too small/don't fit now, too tight, are push up, or have wires. Has anyone used these types of bras before?? Would you recommend? Do they really unhook on you that easily?? Not trying to spend a fortune and I don't want to waste my money so I figured I'd try them out since they're decently priced! Any recommendations welcomed