Lens.com
Lens.com was founded in 1995, pretty much since the beginning of the interwebs, so they have the whole customer service thing down. If you don’t like the contacts you ordered, you can return them for free with no questions asked.
They also have a huge selection of major brands, and you can renew your prescription online with a virtual vision test. The standard prices of the brand are definitely midrange, but be aware that Lens.com periodically offers incredibly deep discounts. You can order weekly disposables or monthly disposables in single packs or in bulk. Lens.com's prices are structured so that the more you buy, the lower the cost.
Lens.com does not take vision insurance, but you can submit the receipt to your insurance company for reimbursement and always check with your insurance company to see what it covers.
Website: lens.com