1.7 is actually decent.
Extra $1.70 cents per 100
So if your were getting $1000 per month now you'd be getting $1017 per month
If your at 100% and married plus got a bunch of kids and you were getting $3500 a month now you'd be getting $3560 a month.
In my case Im grateful for the extra 30$ ill be getting. Long as its still all tax free then Im happy.