Once upon a time, Tamiya set the standard for quality, accuracy and ease of building. And they still do really nice kits, but often, not the best one out there.
Google is your friend. Whip out the smart phone and Google whether or not the particular kit you are looking at is any good or if the price is right. Folks will drive an extra 10 miles to save a nickel on a gallon of gas (and what, save 50¢ on the fill up?), but won't bother to google the price of a kit to see if it's worth the money.
There are so many new companies that make very nice kits. Company A and Company B make versions of the same kit. One might be more accurate, but the other is cheaper and builds a little easier. It's up to you to determine which one you'd rather have.