The link is for a 27.5 not 29er.
I’m being dumb, forgot they did both as I had been looking at a sentier as a possible 29r for myself.
Still think it’s decent for the money. Sonder looks good for similar price. I love the Bird hardtails but a bit more money.
As others have said there are other options, depending on what you’re after. But if purely looking at price then Pinnacle Iroko or On One have offerings in that bracket. I like the Pinnacle range but am biased as I have an Arkose and an Iroko. But still think that the original link would be a very good bike for £900 if Wally gives you the code he has!