I use GMail in my laptop, tower, TV, and iPad and can't remember any problems. Google allow up to 7 accounts and I use two, the second one is my Apple identity in my iPad. I have an ISP email which I rarely look at but I've set it to auto forward to GMail. I get pop-up alerts in the corner of my screen when Gmails arrive and the spam filter seems very effective, and just in case Google ever fall out with me I use Gmail's 'export' to save all my contacts to a file 'contacts.csv' which can be read by any word processor or even imported into Hotmail or whatever it's called these days.