Been using Netflix for about four months, only every had one problem (cracked disc). Sent e-mail and they had a new copy in the mail same day, before I even mailed the cracked one back.
Being that they (Netflix) mail from Mich. I can avg. 2,maybe 3 movies a week. 10-11 movies avg./month for $21.20 tax inc.
Never heard of Moviezip before, Selections look similar,but looks like they charge by the number of movies you want at a time. So for 3 movies it would be $18.95+tax.
Not much price difference so I would say it depends on service and turn-around time.
Remember they ship via the Post Office!