Tor itself is secure, which allows you to surf web with anonimity. This will result that harder to be track by ISP. Therefore, you are just being anonymous but not hidden.

I used to use tor for a certain purpose, but I find the experience is that the connections are slow in general.

Personally, I prefer using VPN which is much faster and I can use public WiFi with VPN instead of TOR. If you want extra secure, maybe TOR on top of VPN LOL...