I bought the MM version and I thought the price was high, but I don't regret buying it. If however the various components of the pack had been available separately I would not have chosen to have all of them.
Whether you consider the pack worth while is such a personal matter, that I don't see how I can advise you. It is not difficult to compare the "with" and "without" specs and it's then up to you to decide on the value to you.
The things that I value (or not as the case may be) are.
The rear view camera and sensors are a boon (I'm old and need every assistance I can get . . . . :P )
The hands-free Blue-tooth telephone system - it works better than any other that I have ever used.
The DVD player (and its sound quality) - I often have to hang about waiting for someone else and it provides great entertainment if you are stuck in the car. I have Phantom of the Opera loaded at present.
The sound system is excellent, but I like to listen to Radio 4 when I drive and a system of this quality is probably OTT for my needs.
The DVD based GPS I have very mixed feelings about. The convenience of a built in system is great, but the system itself does not compare well with after-market systems that I have used. It is better on motorways than on minor roads - motorway information is very good, but some of its route choices on minor roads are just plain perverse and inevitably, its road information is always out-of-date to some extent. It does not have a full post code input system - you have to add the final details of house number etc and plenty of the places that I go to do not have those kind of details in their address. Try looking for a farm on an un-named and un-numbered country lane. It will not take a speed camera data-base file. It will not memorise and retain a planned route. I really do wish that Lexus would use a hard drive/memory-card based system that would allow regular updating by download and data-base file inputs. I have got so fed-up of it for rural routes that I have bought a TomTom that I use when I have to find a remote country site or plan a complex multi-stop route. I knew all of this before I bought the Lexus, having checked carefully and if it had been possible to buy the parts of the MM package separately, I would not have taken the GPS.