It's entirely fine up to a certain point.
You have to define that point.
I'm travelling 600 miles north.
If i have to get their fastest - i might take a ferrari.
If i'm sick and i don't have a time frame, i might get a long-range limousine.
To get their the most comfortably.
It's all fukkin relative.
The absolute most important part however, is that commercial consumer lines are absolute crap and on the absolute lowest end of a networkrouting exchange's "budget".
Your 15 mbit up or down, is theoretical at best - AND is extremely limited in terms of where there's free 15 mbit/sec from routing point to routing point.
You'll end with an extremely slow and non-responsive PC for L2Off however.
And most likely a deadlocked one if your run GF Off.