Today many SEO people spin the original article and make another unique article. I am also use such a trick for doing article submission but I am not sure that it's good for quality article submission ? Tell me it's good or bad for SEO?
its good, but in the future Google may change and easily find out which articles have been spun and could penalise
Yes its defiantly good to spin articles you just have to know what you are doing and make sure each time you change the artice more than 40% so its not duplicate content!!
If you are changing your article 40 to 60% by spinning and submitting these spun articles to different article directories then it is surely going to give you good results. Recently Google has penalized many article directories, so it would be better if you do not submit in these article dirs. Regarding submission - first submit to the top most article site (Ezine) and wait for approval and then do rest submission it will be more effective.
After panda updation its better if you write unique content, it will helps ypu more than spin content.
When are you going to learn that article spinning will not really benefit you? This year is Google Panda year and article is their target! Avoid using such tools and concentrate more on generating quality unique contents which have real meaning.
this comment "After panda updation its better if you write unique content, it will helps you more than spin content." is 100% true but you need to spin article to write in the blog or article site submission. so it also give a good link.