Twin air/ Multi air? it's a very clever idea and I like the flexibility it gives in controlling valve timing. However would I own one? almost certainly not.
If I were buying something "special" and performance orientated I'd be more inclined to entertain something which might prove "temperamental". However, for a daily driver/run around motor, I want something simple which is much less likely to go wrong - and if it does it should be as cheap as possible to repair. That's why I've always bought into the FIRE engines.
Of course this whole philosophy towards the cars I buy would seem to be rather blown apart when you consider the fact I've just bought a Skoda Scala which has a small modern direct injection petrol engine - you can't get anything much more complicated than one of these small, turboed, direct injection petrol engines no matter which manufacturer's brand you choose. I can only say in my defence that I extensively researched the options before buying and that the VAG EA211 engine family came out considerably in front of all the rest in terms of reliability and ease of repair/maintenance. So, I've made my bed and now I'll lie in it! If we have to buy another "run around vehicle" - for instance if something too expensive to repair happens to Becky - I'll be looking for a late model, FIRE engine'd (1.2) Panda.