Hey! I have the Babystyle Oyster, and I've used it for about a year.
Bearing in mind I am a very out and about mum, without a car and who pretty much walks miles everyday, here are the pros and cons of it:
Pros
My 1 year old son is still very comfortable in it
It is very light
Easy to fold and unfold once you get the hang of it
The shopping basked is HUGE and easily fits a weeks food shop in it! (amazing)
The hood is very large, and fully adjustable - no need for a sun umbrella
It has a UV/bug net zipped inside the actual hood, which is fantastic when it's sunny.
Cons (most of which have happened recently, after a year of use)
Once your child is heavy (about 9-10 months?) it's hard to push the pram with the handlebar fully extended, as the frame feels flimsy and weak
Again, once they're heavy it is pretty much impossible to push the pram with the seat facing you, mostly because it's too heavy to lift curbs etc
The frame has weakened a lot, especially at the join where it clips into place, and unclips to fold
The suspension has completely gone, 100%
The adjustable handlebar doesn't catch properly any more, and releases itself randomly
The lever to recline the seat gets jammed sometimes
The sticky strips attaching the seat cushions to the metal of the seat unit have come away, making it looks tacky
The raincover rips very easily at the bottom near the front wheels (Babystyle have had to replace mine twice)
The front wheels bend forwards when lifting the pushchair down curbs - you have to rock it backwards onto the back wheels and lower it down
I would recommend this pushchair to you IF:
You have a car or wouldn't be using your pushchair every day, in all weathers etc
You just live in a town and will be doing shopping etc
I wouldn't recommend this pushchair to you if:
You need a durable, long lasting pushchair
You need good suspension for going up and down steps a lot etc
You wouldn't mind switching to a smaller buggy or stroller when you're baby's older - unless you're really strong this is hard to use when your baby is heavy.
I hope I've helped! I know I've kind of rambled, and been a little negative, but it all really depends on what you want out of a pushchair...
For the price, this is a great purchase! But avoid it if you want one for the long haul, any future children, or if you're planning on being very active mum! :)