Conventionsl vs commercial RE loans

[Paul Kubin]

I am a new real estate investor looking to buy single family and small multi family investment properties out of state. I'm working with an agent I like who is an experienced investor. He has encouraged me to look at commercial RE loans at a local bank he has used for many of his investment properties. I've been preapproved for 4.25 to 4.5% depending on the property, but have yet to see the exact terms, which I have requested. I've also heard from my agent that this bank will do no down and sometimes will make construction-type loans based on projected ARV. 

Are there catches I should be aware of? When would it be wiser to use a conventional home mortgage than a product like this?