In reply to tom.fox:
There bikes seem to offer great value, but I hear mixed reports about costumer service and after sales support.
There frames are usually open mould Tiawan imports with planet X branding on them.
The carbon mountain bike frame is not that light, would expect a carbon hard tail frame to weight around 1kg these days with the planet X one weighting around the same as modern alloy xc frames.
For good value look at decathlon btwin 500 series hardtails. Top spec builds weighting about 11.5kg for about a grand, look like great cross country bikes. But I am sure the planet X bike would be fine, I am considering some of there carbon gravel bikes .
https://www.decathlon.co.uk/xc-500-mountain-bike-gx-eagle-29-id_8518393.htm.... A higher spec build and lighter bike for 100 quid less
Post edited at 10:30