Biggest issue is the 335i Active Hybrid does not count as an "electric vehicle" for incentives and bonuses, etc. as it is not a "plug in" type hybrid, it purely generates charge from regenerative braking and using the petrol engine as a generator. Also, pretty poor electric range as only small electric battery pack.
Without the benefits of a full electric car, then the price doesn't really stack up, so available pretty cheap in UK and as a result importers are trying to bring them over here to sell and make a profit.
When trialling the 535i Active Hybrid, the only thing we were using the electric motor for was the "eBoost" kick of acceleration, LOL.