5 stars because I use google in my home life (Gmail, Google Calender, Google reader) and in my worklife (google adwords, google analytics) and their products are simply top notch. There is room for improvement obviously, but compared to the competition it's a no brainer.
There's a good reason google are number 1.
I like to use google.com to search for just about anything. I also like their e-mail service and have had no problems with it.
I have closed my gmail accounts and started using other search engines to avoid the amount of data these people collect and sell off to other companies. I do not want what I search for on the internet, my emails, or anything else about my life being collected and analyzed by these people that feel it is appropriate to spy on people.
Google is a great search engine for pretty much any queries,
The problem is, they spy on you, (No lie). They build mass amounts of information on you, then sell it to third party for profit.
If you have a Google mail account, they store your mail on servers and read through them if they please.
(They state this in their terms and agreements).
They also track your search history and link it to you, trust me Google is not to be trusted.
I would rate 5 but Google starting to change.
The old philosofy was - I give you this wonderful free service - now they add profiles and request and a little bit of self promotion.
The service still good, but is not so perfect as before. Personal information and time have a big value. I don't want give away any of them.
If you do as Google asks you to then marketing on Google can pay dividends. We are all now very familiar with them and although I have given them 4 stars, in reality its more like 4.5 stars.
As a marketing company owner for small businesses then I recommend them to all my clients who take advantage and reap the rewards ten-fold
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