If they can work on two issues (that I've experienced), they would be the best ISP SA has ever seen:
1) Their awful support. Tickets go unanswered, sometimes for weeks. Sometimes it just goes completely ignored. The forum support makes up for that a bit, though, but most customers have to rely on their ticket system.
Edit: Let me amend the first point. They tried to double bill me for July. Probably some confusion over moving to a new place. So I sent a ticket and it was answered and resolved within 2 hours. So this is both bad and good. But it shows their support can have really amazing response time, so I don't know how to rate their level of support, because I've also had tickets that went unanswered for weeks only for PBCool to assist me on the forums instead so I end up just closing the ticket on the portal.
2) For some reason you have to use a proxy to watch Twitch properly (which is hidden away in the 400 page forum thread somewhere). While this isn't a massive problem for me personally, most customers probably don't know to search myBB forum threads for a proxy or how to use it. I don't understand why, if they know how to deliver a smooth Twitch experience, a proxy is required instead of just working out of the box. I'm sure they have their reasons though. I'm aware most of their customers probably don't watch or know what Twitch is and wouldn't consider this a problem, but I can only speak of my experience.
Their international goes down now and then, however, either completely or just at much slower throughput. I don't know enough of what's going on behind the scenes to know if that is Cool Ideas' fault, so personally I'm just gonna call it unfortunate circumstances and not hold it against them until I'm more informed.
But when their internet works, it's absolutely rock solid, which is 99.8% of the time. I've only seen international struggle once or twice since I've been with them the last few years, so for me it's a non-issue. I can't speak for other people's experience, though.
All-in-all, I have and would recommend Cool Ideas to family and friends and I don't regret it. I've gotten them like 10 new customers.