Having seen these for myself (I saw some prototypes a couple of weeks ago) and having a bought a runaround connection kit earlier in the summer, these Welfare Hutches ones are a lot, lot better - both in the strength with which the pipe connects and the ease of use. I also think its nice that they can be painted to match your own hutch and run colours and that they are far more affordable.
Whilst it has some similarity to the runaround, in that its the same concept of pipes and tunnels to create a more natural and fulfilling life for rabbits and it uses the same single skin, perforated, corrugated, drainage pipe (which if you brought it for its intended use comes in a minimum of 50meter lengths), it is however very different in the way the pipes connect. This different way of connecting the pipes makes his kits not only easier to use but, in my opinion (from comparing my runaround kit to his prototypes) a 100x more secure at the point of connection. Also because of the pipe used, it is compatible with runaround, so you can use it to extend your existing runaround kits. However his designs have in my opinion far exceeded the standard of runaround and the added competition to the market will hopefully result in runaround improving their products and prices too, which can only be a good thing.