Catch up tv is great if your internet can handle the bandwidth load that it will put on it. This does not tend to be much of a problem nowadays because most places have pretty speedy internet thanks to broadband and thus catch up tv is openly available to everything. But there is nothing more annoying then having to watch the show that you wanted to watch stutter about and buffer every few minutes. A great tip when you watch catch up tv online is to let the show stream and buffer a bit before you jump into watching it as it will give it time to get all the information streamed to your computer and avoid any hiccups during playback. This minor inconvenience of pre loading a video is the lesser of two evils compared to your video buffering when you are trying to watch it, especially if it gets to a good bit and does it!