Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is the Quick release plate removable from the ball head and replaceable with a Manfrotto or Giottos?
Document: The build on this head is great, very heavy dudy, but the quick plate system is useless. It doesnt stay tight and the plate unique. Skip this. *UPDATE*I've tried to replace the quick release plate with a Manfrotto clone, but the thread pattern on the mount is not a standard 1/4-20, not sure what it is...so you have to use the original bolt. It doesn't work well with the small clone, but does work with the larger giottos MH621.
This is a very sturdy ball head with quick release. I purchased it to go on my monopod. It is very heavy and solid. Great from my perspective but if weight is a concern this may not work for you. The only reason I didn't give it 5 stars was that when I received I realized I would have to purchase and adapter (Manfrotto adapter with a rubber flange works great). This is a great value and the quick release plate works well but holds tight when in use.
I chose this camera mount ball head because it is compatible with the ManFrotto camera quick release plates. Although the camera attach plate is large enough it will not go into the ManFrotto quick release plate, the ManFrotto plate will go down into this ball head Quick Release Plate. It may be a little bit loose but is easily shimmed to tighten up.I highly recommend this Ball Head, and if your using Manfrotto quick release plates, it works well. Also, the seller shipped amazingly fast.
First of all, this ball head is really heavy, so you know you get your money worth. The quick release plate works very nice. It is very easy to control the ball position, or move the ball around. Make sure you buy a adapter, so you can mount this ball head to tripod or monopod.
As of yet, I can not report on how well this product works on way or the other. Still waiting for the adaptor needed to attach the Ball Head to the top of the monopod. But I can report on how it is built. It is an all metal construction and turns on the ball smoothly. The locking lever holds the quick release plate in place securely.
This ball head is everything you can pick up from the picture. It's incredibly sturdy, lets you adjust to almost any angle with a twist of a knob and is a great addition to my monopod, especially with the built in quick release plate.It is heavy, though, on the attitude of a little over a pound. That doesn't sound like much until it's on top of a monopod. Until you're used to it, it really throws the balance of the whole thing off.
It's got a bit of weight to it, very solid, and the quick plate pops out if nothing is attached to it when being released.I will say, the packaging is a pain in the butt but the ball head makes up for it. I ended up using this pretty much as soon as I got it out of the packaging and loved it from the get-go. The quick release plate is small and rugged and everything feels like it'll last as long as my camera.
I use as many camera mounts as most people use USB chargers. So, the idea of a inexpensive substitute for a Manfrotto quick release would be extremely appealing.Although a Manfrotto plate will fit this release, the Fancier plate won't fit in a Manfrotto release without first being modified.The movement and tolerances on the two I bought are not as nice as the Manfrotto, IMO. For me, this is fine for applications where I need to lock a mount in a certain position and leave it indefinitely.
This ball head is much larger than i thought it was going to be. It is very well built and I feel very confident in it supporting my Nikon D-5100 camera on top of my monopod. The ONLY thing I wish the manufacturer would add to this is if it came with the  3/8"-16 to 1/4"-20 adapter instead of having to buy one. I do like the Quick Release plate on it as well. it just adds an extra feature to this unit.
I was looking for a metal ball head to mount to my DIY camera trolly, jib, slider etc. I didn't want to spend a bunch of money for one of the big brand name products. This really is an incredible value. The weight of the product is substantial...it feels well built. The fact that it also comes with a quick release plate makes it almost too good to be true. Obviously it does not have the silky smooth operation of some of the more expensive alternatives out there.
Answer: I just checked, and yes, a Manfrotto QR plate adapter will fit on it just fine.