M.H.
I had straight talk for a few months. I had the 'LG 620G '. The coverage is pretty good for straight talk. Never had any dropped calls. What I did notice was that the volume on the phone wasn't very loud, even at it's highest. I'd always have to ask whoever I was talking to, to repeat themselves A LOT. No matter if I was talking regularly with the phone to my ear or with the speaker on. I didn't like that. It also had the option in the phone to add your minutes but it never worked. I always had to call or add on the card online. Also the camera wasn't too bad.
Overall I'd say it's a good phone plan. It's cheap, gives you 1000 minutes for talking and 500 in texts & 500 out texts.
I'm not sure about the other models of phones.
I finally got sprint back. Although it's not prepaid, I love it. Love my unlimited texting & data. LOL.
EDIT :
If you decide to get straight talk, the phones are a lot cheaper in the stores than online. But they usually only carry a select few.