[Ball Head] I wanted a compact ballhead to use with a Platypod Ultra and this meets my needs completely. Unless you use an L bracket portrait orientation would be an issue but as I have L brackets on both of my OMD EM-1s I don’t have that problem. I like the spring loaded mechanism that enables the repositioning of the ball release/lock lever to what best suits you.

[Arca-Type] This looks like a great tripod head. Well made, sturdy, small and lightweight.
I converted my REI Hiker Power Lock staff into a monopod using this ballhead and the Op/TECH USA wrist strap. Just unscrew the cork ball covering the camera mount threads, put on the included thread adapter, then wrap the wrist strap connection loop around the screw and screw the tripod head on. This tripod head is light enough not to make the hiking staff not too top heavy like other heads do. I love it.

[3/8"-16 Female] Solid and well built. Holds my 80mm spotting scope firmly in any position. Smooth operation with knobs that are easy to turn.

[1] This is the most solid and well made ball head I have ever purchased. Smooth operation with well beyond the average holding power of most. No problem holding my Nikon D850 with my Nikon 70-200 F2.8 vr lens at any angle.

[1.96 lb] Some very nice things about the Sunway: 1) The panning base doesn't slip, even with my 1Ds2 body and 300/4 lens. That's a pleasant surprise, and my biggest pet peeve about some other high-end heads, i.e. the Markins (I use a Q3 on my smaller tripod). The panning lock knob is larger than any other I've seen, all metal with large teeth to grip, and very smooth in its action. 2) The friction/lock knob also works like a charm. As with the panning knob, it's very large and easy to grip, and very smooth to operate. Most often I'll set the friction knob (on any head) to allow the camera and lens to sit still when untouched, but allow movement when I apply some force. This friction level is easy to set on the Sunway, and another big surprise, when I position the camera, let go, and then fully lock the knob, the ball position doesn't shift. This is a nice improvement from the previous Sunway DB-44 I tested last year, which allowed a long lens to pitch slightly forward. 3) This ballhead was delivered with a basic screw-type clamp, with index marks and an easy to see bubble level, but Sunway also makes a very nice lever clamp (which I've used with their DB-44), and a panning clamp I've read good reviews about. I'll guess one can order the XB-44 in any of those configurations.

[1.96 lb] I needed a low profile ball head to handle a Sony FS7 on a Cinetics Axis Motion Control System and this one has proven very reliable.