I've used IMR 4350 for a long time and always get good results from it. It was the first powder I started using when I learned to reload for my first 30-06 20 years ago. The kernels are a bit larger than H4350, so it meters a bit worse. And it's not rated as temp-stable like H4350 is. But I still use it.
I ran through one pound of it when I first started. I couldn't find a load that I couldn't best with H4350 and the temp stability is better with Hodgdon too so that's where I stay. For some reason the IMR powders are really marked up at my local bass pro.
A pound of IMR 4350 is $79.99. A pound of H4350 is $63.99. Both outrageous prices but i have never figured out why they ask more for the IMR stuff.