We purchased the silver cross 3D last year and have found it to be very good value, but with some design aspects that may render it unsuitable for some. The positives: you are getting a complete system: pram, pushchair and in our case the car seat was thrown in for free from Babies R Us and a change bag too. Both the buggy and car seat come with detachable hoods and there was a rain cover and foot warmer included. We use the buggy in car seat mode on a regular basis. We had to buy a seperate raincover to fit the buggy in this mode, and that cost £25 from silver cross, though you may be able to buy universal covers. The universal parasol from Mothercare fits securely. I love this buggy. However, the car seat is heavy on its own let alone when the baby is in it, so my Mum who has a dodgy back can't lift it. The car seat does not fit in the front of my car- I have a peugeot 206- as the seat belt isn't long enough, so it has to go in the back. I find this a little unnerving as our baby has reflux and I like to see she isn't choking. The sling underneath the buggy is awkward to put things in, but is strong and will carry heavy items such as 8 pints of milk easily. It is quite a long contraption and only the front wheels turn, so turning can be awkward until you have the knack. Although it has been fine for use in town it is not so great over the grass in the park, and I have looked with envy at the buggies that have better suspension as we have a lot of cobblestones where I live. Another consideration is the angle of the car seat; looking at other seats I feel babies ae more upright in them, which may be an advantage if your baby has reflux.
To sum up, if you get a good deal this is great, if you pay full price - not so good. We paid £220 for the lot.

Addendum
We are now using this buggy in the pushchair mode. The seat has three positions so baby can be reclined if they are sleeping when you are out. The raincover that was supplied with the initial set is now in use and does the job well. It has elasticated edges and fits over the buggy easily just allowing the handles to come out.