I used to work at a shop that had standardized on tabs. It is fine when all your co-workers are using the same standard. Any decent editor will give you lots of control over this sort of thing.

One pointer that may be of interest to vim users. Turning on visual whitespace makes it much easier to avoid mixing tabs and spaces in the one file.

In my .vimrc file:

set list
set listchars=tab:»·,trail:·,extends:>,precedes:<
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displays both tabs and trailing spaces.