It's OK. It's watchable, but mostly because they shamelessly ape the Clarkson-Wilman programme model and style.
Not a patch on the peak Top Gear era of several years ago - before Clarkson & Hammond especially began to over-act and the same stereotype became more stale the more it was over-emphasised.
The interplay between le Blanc, Harris & Reid isn't anywhere near as entertaining. Le Blanc is OK as a presenter, but to me Harris comes across as snide, and Reid like he feels he doesn't belong.
Saying that, TGT has been mostly poor from the episodes I've seen so far (most of s1, one or two from s2); more of Clarkson & Co being their over-emphasised caricatures and it seems over-scripted. Throw in some cringey toilet-humour and obvious-five-minutes-before-they-say-it jokes, and it's been a disappointment. Clarkson has always had a knack with metaphors and still comes out with the odd pearler, but it's not enough to save it.