It might not be the best but it's good enough. Most of the heavy lifting GUI code is still in Obj-C, it's just going to be hitting ruby for microseconds. Sure

It might not be the best but it's good enough. Most of the heavy lifting GUI code is still in Obj-C, it's just going to be hitting ruby for microseconds. Sure if you're writing the unreal engine it's not going to be the best idea, but it should do fine for a Facebook/Three20 type app.