This is one of the best balls I've juggled for 1-5 balls. I mix a lot of contact juggling in my toss juggling and the sil-X 78mm ball has just the right size. It's not too big for throws and it's not too small to control your contact rolls.

That being said if you're interested in 5 ball siteswaps this ball is a little bit too big for some siteswaps. And for 6+ balls I'd definetely recommened some beanbags.

The quality of the balls are outstanding! One time I accidently dropped a ball on the street and a car ran over it and it was still in tact. It was only really dirty but I washed that of really easily.
These balls will get dirty fast but you can wash it of. Be careful with inkt though cause if it gets inkt flecks on it they will be permanent!

When I was given these balls as a Christmas gift I thought the hey looked quite interesting, and handled well, but I never expected to use them much. How wrong I was! They took a short while to get used to, but quickly became my main working balls for my shows - the liquid interior not only gives great balance in higher throws, but also, as it is visible inside the balls, the effect of seeing the liquid moving and spinning around adds to the fluidity and beauty of the juggling. I love them, and have to make myself switch back to regular balls during practise and shows to keep my hand in with them, but these balls will, I am sure, form my main prop for ball juggling for a long time to come.

Currently learning to juggle 5 balls. Switched to these from bean bags and they are now my favourite balls to juggle with. They take a little bit of getting used to but once you try them you will be hooked. Very smooth in the air.

These are my favourite balls, especially for stage work. Nice and big and colourful so very visual.
The 78mm versions feel quite "meaty", they're a bit a bigger and a bit heavier than most balls. I found the size and weight has really helped improve my 5 ball juggling although it does make it a bit harder to begin with!
I prefer these over normal stage balls because they don't bounce out of your hands like stage balls sometimes do. They are a lot easier to catch and throw!
Cons:
If you drop them and they hit your foot on a smooth floor, they roll a long way!

They seem to get marked easily.

Too big for 7+.