I don't own the JuicedLink slider, but I did buy a slider very similar to the discoverycam off of ebay. The one I got is a combination of two Cinevate designs. The trolly looks identical to the discoverycam pictured here on personal view. But the rails of mine are 5/8" and either polished stainless or chrome, the same size and spacing as the Atlas 30. The JuicedLink slider also uses this diameter of rails.

My slider has some pluses and minuses. First the minuses. The center articulating link is very hard to lock completely down. My seller had received complaints before and shipped mine with large handled locking knobs for those two links to match the other four locking knobs. If you buy the discoverycam, you'll need to replace those center knobs. They do the trick for most things, but can still not quite get the job done if my tripod head is a little stiff and depending on the type of move. Panning isn't a problem, but tilting can be. The other joints are also tough to lock down. I've found the most stable position for the trolly is both legs pushed together under the bowl and tightened as hard as possible. I'm thinking about breaking down the trolly and hitting the critical areas with an emery cloth to correct this problem.

Now the pluses! Having one set of wheels above the bars and one below is great because you can position both sets tight against the rails to give you just a little bit of resistance, which can be really nice depending on what you're doing. Sometimes a smooth stop is the most important part of using the slider. I still have to periodically tighten things up to achieve this effect (see above). The other great thing is that mine is built like a tank. I've actually attached a four foot mini jib to the trolly to achieve some really crazy shots. I'm not sure if the rails for the discoverycam are as robust and smooth as mine are, so that's something to consider. The bowl is excellent. Place the dolly on a slight incline, level your bowl and you have a smooth and effortless slider shot. (The same can probably be achieved with the juicedlink and a bolt on bowl.) Don't forget, the trolly is also a tabletop dolly! For smooth and repeatable radiuses, you'll need to only let 4 wheels touch the table, not all 8.

@tvpglabs

Thanks for all the info, very helpful. What did you pay for yours? How long is it? That slider jib shot sounds pretty cool. Footage?

http://www.ebay.com/itm/Wieldy-Dolly-Track-mini-rail-slider-skater-5d2-7D-DV-/120744279793#ht_5396wt_1398

Is this it? If so it's about the same price as the deal Vitaliy is offering when you add shipping, but the DiscoveryCam looks a little more polished.

@kupchenpo

It is not the same price, as shipping is very different (because for DiscoveryCam we use fast and good one).
I really do not recomment Wieldy, as legs are much worse.
All thumbscrews are worse.
Believe me, as I have one :-)

guys hi, does anyone know of any reviews for the discoverycam slider? i can't find anything, and was really looking forward to know more about real-world experience and opinions..