What BBox said - tho' I don't know anything about Macs so no opinion there.
I have a Lenovo T42 which I give all sorts of hammer: never any problems. In the past year three people have asked me to find them a cheap lappy and in each case it's been a Lenovo T-series. All three people have been delighted; what's even better is that none of them have come back to me with 'Jim, can you help...'. It's a product which reminds me (in build quality) of the old - very old IBM PCs. They were the original brick s-houses of the PC world - rugged as they come and used by many long after they became obsolete.
And yes, all four Lenovos have been refurbished units from Ebay.