Expensive for what it is but if need it you have to buy it. It’s easy to fit, suggest you smear vaseline on the holder before installation to give a solid water seal. Buying direct from Monarch is a lot more expensive.
The filter appears to be fine but I cannot remove the old one to put it in place so it isn't being used.
Monarch are unable to offer any help with removing the old filter other than "bash it with a hammer!"
Arrived well packaged - but it is just a filter - no wow, excitement or inner feeling of joy at its purchase. If you need one then price is the sole determinant.