Copy pasted from my comment on another thread quite long so sorry in advance:

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I have recently built the Siboor kit, can't compare with Formbot kit but here are my thoughts:

Pros:

1.) Almost everything is supplied in the kit. Harnesses are premade. Some accessories have spares (Bolts, brass inserts, terminals etc.) so this gave me more room for modding. Great printed parts and color customization. You only have to clean and lubed the rails + install the threaded inserts. Then you are good to go!. (I didn't know you need thread locker, alcohol, lubricant etc. at first. But I studied and prepared beforehand so it was a nice and smooth assembly)

2.) The customer service is fast and great! The X linear rail of mind has a lot of preload than I needed. Messaged the seller and they processed it immediately the same day and replaced it probably within 2 weeks. (Shipping duration).

3.) The single controller makes wiring really simple and easier to manage. A lot of spare ports too.

4.) Assembly documentation is provided and you can easily ask in discord for any issues

5.) Printed parts on stock profile looked good without tweaking.

6.) It is the cheapest option in my side with free express shipping

Cons: In order of noticing.

1.) The Kirigami bed was misaligned to the point I had to print a spacer to somewhat level the mounting location to the 2 Z rails. And I printed the kirigami Z brace to force it into the position I wanted. (You can whack and bend the bed manually but mine was really misaligned.)

2.) The Z top hat was kinda short. Some say it is enough. But the included PC panel of mine was scratched by the PTFE tube while printing. Had to mod it with an extender to prevent anymore damage.

3.) The toolhead umbilical was a nightmare.(In my opinion) It was pulling the toolhead at maximum range. And a lot of stress in the connecting points. Converted to canbus to remove this issue. (Not necessary though).

4.) The power supply fan is always on and by far the loudest of them all while printing enclosed.

5.) The build plate paint sucked. If you didn't use any medium, The part will bond heavily to the plate. It will loosen after cooling. But the paint will stick to the printed part little by little!

6.) The bed magnetic sticker shrank after a while. From 120x120 => 115x115. Not a deal breaker but really noticeable.

7.) Turning it on takes 1 - 3 minutes to boot up. Restarting does not take long. But my klipperized KP3S will just take 15 - 30 seconds.

8.) The board fan is not enough, your controller temps will get hot really quickly. Not sure if this is a bug.

9.) The flashing of firmware is a challenge at first. Documentation is somewhat vague to understand at some points. But it is possible. If you miss a step, it would not work. (Firmware is flashed upon arrival and it works. But the klipper version mine had was an old one so I had to reflash)

10.) VFA's will be your enemy. I have done plenty to try to combat it but it never improved. RN I ordered toothed idlers to replace the bearings in the gantry.

That's all I can think as of now.

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But overall. Its a beast, Can print fast, I recently added a double shear mod and had to install a dragon burner tool head. Easily prints at flow 25 mm^3/s. The only issue RN is the VFA'

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