iOS Devs how do you feel about custom tab bars that look nothing like the standard tab bar?

Thinking about replacing iHog's tab bar with a custom one.

Main reason for doing this is I can get some screen real estate back on iPhones and smaller devices. Other reason that isn't as important is cause I think it looks cooler.

@heyjaywilson i was going to mention the accessibility angle too, trying to recall just how many behaviors were already coded by apple for it… I have 104 in my head but do not think thats it, probably higher.
@PeterH i def shouldn't look over accessibility. i do need to look into what apple's accounting for and see what i need to bring over. i'm thinking i'll just stick with the standard tab bar at this point though.