That looks really interesting. Might be ideal for ground level shots with my 5D2 + x1.4TC + 70-200 f/4 IS combo for shooting local cricket games! Fixed set up with remote sit back in chair and second nody handheld to cover changed ends and fielding [emoji41]The Pixi is a good little tripod - I have one but use it mainly as a flash stand - but my favourite is the Novoflex Basic Ball, currently with a Pig Iron ball head. It's considerably larger and heavier than a Pixi but the added strength and versatility makes up for that for me.
I find the PIXI doesn't hold my 5Dmkiii well with anything other than a small prime. At least, not if trying to shoot at an angle.