Would an Arris Touchstone SB6183 work?

I have an older modem at home, and wonder if it would still work. It's a Arris Touchstone SB6183.

Also, would it have any speed issues?

I'm signing up for Xfinity's "Internet Connect More | Download speeds up to 200 Mbps; Upload speeds up to 100 Mbps".

I read that the SB6183 is DOCSIS 3.0 Cable Modem, i.e., support up to 250 Mbps