Retail on this filter is close on to £300, so I would say that is a pretty good deal. The only thing I would say is that I have one of the 2229's (same filter just without the heater) and they are quite noisy compared to standard Eheims, and useless at mechanical filtration!! If you are going to get it, make sure you have another filter in place for mechanical duties, and that it isn't in your bedroom!!
One other thing is that because the filter is constantly emptying and filling, and has a capacity of 2g it constantly alters the level of the tank, so make sure your tank is big enough for this not to matter!