Every time I switch from one open file in to another open file in Zoho Writer which have tabs like in browsers, it doesn't load it from cache, so it takes sometime to switch from one file to another in Zoho Writer even they're open and haven't been changed since I closed them.

I also met this problem in Zoho Notebook when tried to switch from one book/page to another even they were open and hadn't been changed since I open them.

Generally this problem makes Zoho slow.

Another problem which I discovered is the lack of good old paint brush feature that there is in MS Office.

All in all I use your office suite and they're advanced compared to other online office suites...Thanks for your efforts.