I bought it last year and overall performance of this tab is average because of its mediatek processor and only 1GB DDR2 ram.
Its performance will gradually decay after 10-12 months. I was facing too much lag for the past 15-20 days so I have to save all my data and den format it. Now its back to normal but its showning free ram as around 450MB but by other info app it was showing 300MB only. Now lenovo has launched a new tab which is much more powerful dan dis one. So go for lenovo PHAB 4G