So, I can weigh into this somewhat.
I was sceptical at first, but as the bot lets you play without having to actually use money in the demo mode, I gave it a shot. It's pretty good, and simple. Essentially, it just creates a buy order at the % above last price you define, and then you can select partial sells at certain percentages, or cancel and GTFO a bad trade immediately.
So, there are tons of bots out there that already do this. What makes this one good? The beauty lies in the GUI. Having a graphical representation of the trade in real time is the handiest thing I've seen, because I can see when the pump looks to be levelling off, and get the hell out before a dump happens, even if it didn't reach my defined sell goals. When you watch the books on Bittrex and the volumes on text, it is not nearly as clear. For me, this is by far the handiest feature.
No complaints on the speed it purchases and sells either, it communicates with bittrex immediately. The slowest part of the whole process is when you type in the coins - gotta be fast. The developer is working on a solution to automate this as well in time, he just wants it to work consistently before he releases it.
If you have any further questions, I can answer everything you want too, if you don't feel like the developer himself is trustworthy enough and is just shilling his own product (hell, I thought that too at first). Just shoot me a PM here or telegram me @nostos156. I am able to offer discount codes as well if you need them, up to you.
Of course, there is always a disclaimer: This bot is NOT 100%. You need to make sure you're entering a good pump before you go all in (if a pump notification barely has anyone reading it before it goes live, don't bother. You'll get dumped on immediately and the bot can't save you there. Avoid shit pumps). I've had successes, I've had fails. For what it's worth, way more successes than failures. Picking the right pumps is kind of an art in itself. Just remember a simple fact of life: EVERY single group prepumps, otherwise, the admins won't make money. They dump their coins immediately on you as soon as the pump goes life. It is a fact of life and those who claim no prepumps are even scummier than those who stay silent about it. This is why you want high volume pumps, as the sheer amount of people going in will slam through the dump by the admins and you'll still make a profit.