Will this have insanely strong magnets like the gocube, or a little weaker magnets?
Never used the gocube.
Magnets of Rubick's Connected don't seem "insanely strong" but are noticeable. Gently turning a side to 20*, the magnets won't pull the side to neutral 0*. Between roughly 0*-15*, the magnets will pull a side to neutral. My cube has a few drops of Lubicle Silk and is new so not broken in; YMMV.
As the electronics core seems to have a bit more friction than a premium standard core does, the magnets are probably pretty strong but in practice feel average to me. In the video above I think Sean said, "magnets are a little bit strong."
Overall, I like how the cube feels; slightly more sluggish and heavy than my premium non-electronic cubes. I put a few drops of Lubicle Silk and that helped a bit but I will try some experiments. IMO, the GTS2M turns a bit easier, smoother, lighter and quieter. For reference, I am just an advanced beginner (60 sec average, cubing for about a year) but like tuning cubes and electronics.
Does anyone know if you can tension this cube? Im very tempted but would like to understand if you can adjust
"Due to the complex electronic design found in each of the cube’s center pieces, the spring force can’t be adjusted. "
if lubes are safe before I commit?
"
Can I lubricate my cube? Of course, like all other speed cubes! There is no concern of harming the electronics with lubrication."
Source of these two answers - click the help button at the bottom of this page and type in the words "lubrication" or "adjust":
support.getgocube.com
BTW - I took off the white cap and there are similar electronics there. Essentially two small PCBs. The large PCB is nearly the size of the sticker and is physically held in with two plastic stakes that were melted at the ends. Above that, a small PCB was soldiered on (then conformally coated). The small PCB might cover a screw to adjust tension but I can't tell and suspect not. I don't think these boards should be removed by beginner electronics DIY.
Video below shows how to remove center cube cover...there are electronics below the blue cap.
Oh...just saw the Rubick's Connected is down to $49.95. We got one at $49.95 early September (price rose to $59.95 late September). It is listed at $79.95 retail on the website but I don't recall seeing it ever offered at full price.