I've not used that particular one so can't comment on it. But what I would say is I moved to using pocket holes on my current build and have found them superior in every way over the other options

I have the Kreg kit, specifically this kit -
https://amzn.to/2WWLfU7
But in actual use, I rarely use the strand and for the great majority of the time use these components:
Clamp -
https://amzn.to/2MLSbzQ
And the 3-hole version of this jig -
https://amzn.to/2MCQBjF
I'm not sure if I would spend the extra on the stand and I personally would get the two items above over the Trend kit for a similar cost (not a great fan of Trend kit).
Not sure what the difference between the R3 Jig above and the R3 Jr jig? they look identical. Maybe the R3 Jr is USA specific (the Amazon listing is for an imported one and will be £33 incl shipping against £41 for the UK supplied model).
I would not use the jig without a clamp and the Kreg Clamp is sized specifically for the Jigs and quite different to using a generic clamp. Extra cost yes, but extra speed and reduced hassles.
For Pocket Hole Screws, this box is I think good value -
https://amzn.to/2Mx7Jab . Covers just about all you need and loads in there.