Swarovski are good and are at the low end of the class they are in, the Nikon ED's are equal if not better and not as expensive as Swarovski. The american Leupold & Stevens are also the equal of swarovski.
BUT none hold a candle to Lieca or Zeiss, these two are the dogs dangleys, the image contrast, flatness of field and comfort under long periods of use is beyond compare.
Either one will set you back about a grand or so, I wear glasses and like the chunkiness of the Leica 10x50 BA's and my wife likes her Zeiss 7x42 Dialyt
I also have a Zeiss 30 x 60 mirror scope which is small enough to carry on deer stalking trips and easy to hold with the shooting stick when picking out a particular deer.
Zeiss Riflescopes are much superior to Swarovski scopes and there is not much difference in cost.
So the answer to your question is yes they are good but no they are not worth the cost, for not much more money Leica or Zeiss are better, the cost is in the type of materials used and the time it takes to grind a perfect lens.
When buying binos you need to bear in mind your ability to hold them still, the design of the bino will affect this greatly, the Roof Prism design is the best to hold as the glasses fit naturally in the hand, an 8x magnifcation is good to hold , 10x magnifcation is more difficult.
Binoculars are expessed as 8 x 40, 10 x 50, 7 x 50 etc, the first figure is the magnification, the second is the Object lens diameter 40 or 50 mm etc and this has a direct relationship in light gathering power, the larger the object lens the higher the light gathering power, there is also the exit pupil diameter this is the diameter of the circle of light exiting the eyepiece, and if you are a spectacle wearer this is important, the exit pupil is the object lens dia divided by the magnification so an 8 x 40 bino will have a 5mm exit pupil a 10 x 50 will also have a 5mm exit pupil, a 7 x 20 the small folding types will have a 2.8mm exit pupil, now the exit pupil diameter should be as large as your eye pupil in low light and by coincedence most peoples pupil is 5mm in low light so you will see well into the shadows with a pair of 8 x 40 or 10 x 50.
As magnifcation increases the exit pupil deceases and the ability to hold them still also decreases.
In conclusion then if your pocket can manage a grand or so then Leica or Zeiss, if you can't manage that the Leupold & Stevens or Nikon ED's will be about £700 or a bit less in the UK.
If you travel to the USA then Leupold or Nikon will be half of that but Leica & Zeiss will be nearly the same as UK.
