I'm only paying for 60 Mbps, but not gonna complain.

Last week I wired up my home network (including custom modem and routers) myself, because the stuff my ISP wanted me to use was garbage.
Luckily Germany has "router-freedom" so ISPs are not allowed to force us to use their device to dial into the network.
I did everything myself, because the 'technicians' they kept sending me were just idiots who didn't know anything, considering the highly paid job they are doing. Usually they told me, to get the device from my ISP, because my "Router" (actually a business grade, standalone Modem by Cisco, to feed my Router) didn't even have WiFi ( lol ). Also all Technicians didn't arrive at the agreed date but at some other time. I wasn't able to wait any longer.
So I did it myself.

Consider me something more like a student of theoretical computer science. Not actually supposed to be experienced with hardware stuff.

The ISP is serving me with a DOCSIS 3.0 Network based on the television cable network in my city. For some reason they are providing the internet-access to only one socket in the apartment, which has a rather uncommon "WICLIC" connector. After having trouble getting an adapter for WICLIC to common coaxial F-Connectors (used by every DOCSIS-Modem), I made one myself.

After setting up everything (not that hard, once the connectors fit) my modem told me, that, while I'm perfectly connected to the ISPs internal Network, I still can't access the internet.

So I called the ISP...
After getting ranted at, about that what I'm doing is illegal and only certified employees are allowed to do this and I will break more, than actually do good and that I can't just connect my own "Router" (again I needed to correct her: Modem) I hang up the phone.
Also she accused me of hacking their devices because I'm not supposed to see my IP address... (My Modem told me on its web interface. I didn't even need telnet for that.)
I went to the ISPs head office, told the first desk as many technical terms as I could remember and got forwarded to something like the main technician.

He was a really nice guy. The only sane and qualified person I dealt with at this company. He asked me for my Address and Device Model, I told him my MAC and last internal IP, I had seen and he activated my internet access within a minute.
We talked a while about the stupid connector that ISP is using in the homes and he gifted me some nicer adapters to connect my modem to the wall.

Why do ISPs hate their customers that much?

One of the big ISP/entertainment companies dug up the roads a few months back and laid fibre optic cables (cutting through a power cable in the process but that's another story).

Recently had someone turn up at my door to chat about their services. All sounded very good, I took a card and gave it some thought and did some research.

So, it'd be a little cheaper than my current provider (FTTC setup). It'd be faster for downloads, slightly slower for uploads (I want fast upload). IPv6 is only on their business packages. I use IPv6 a lot. I also have several static IPv4 addresses.

It would involve getting a cable in to where my equipment rack is, and one to where the TV is (which I spent ages building a TV unit with power, network etc.)

To record/watch TV in another room with their service, I'd need to pay extra. The service just provides HD channels that I can already get, unless I pay more. At the moment I have MythTV handling all the recording of TV shows I want, and Kodi to play them back on different TVs, via CAT6 I spent ages installing into the walls.

Then there's the uncertainty of how nicely their equipment will play with my relatively complicated setup.

I decided, it isn't worth it really for me. I would have to change a load of stuff just to end up with what I already have... But with more limitations.

Anyway, the guy turned up again a few days later, I told him of my decision and away he went.

Since then I have been visited by 2 other employees of this company to try to sell me the service.

It is probably great and convenient if you are not like me and DIY all your home network and media distribution setup...

Also the ISP I'm with is quite small. They are very knowledgeable and friendly and I can get through to someone quickly if i phone. What I use meets my needs, so I prefer to support the smaller company in this case.