I've reviewed the SE X1 mic and isolation filter elsewhere and given them 5 stars. This I've given four - it does what it's meant to do but could be a bit easier to mount and a little sturdier.
Back to back testing shows that the plosives get cut out substantially on close mic'd vocals so the pop filter does what it says on the tin. My only concern is that the mesh screen has no surround to it so it's in danger of being bent or creased if carelessly handled or stored. A rigid plastic surround to the mesh would, in my opinion, have made it strionger. That said, of course, if it does get bent, it should be easy to bend back into shape so maybe I'm worrying unnecessarily....
The mounting bracket is pretty straightforward and, once it's in position, holds the screen nice and solid - but, again, it just feels a bit less rugged than the mic and reflexion filter and I'm not sure how long it will stand up to the kind of ham-fisted abuse that I tend to inadvertently dish out. So far all is well so, again, I may be worrying without reason.
For the price, though, a great peice of kit that does what it says on the tin. Well, on the packaging anyway.