I bought the Milescraft drill guide to modify my workbench with MFT 20mm holes this past fall. Cost about $40 at Woodcraft. I think it's a nicely made and quite afforable rig. However, I learned The Hard Way that it is limited with its 3/8" chuck - the Fisch 20mm drill bit I bought for the task had a 1/2" shank.
When that wasn't going to work, I looked up the Woodpeckers and Rockler versions but was shocked at the price difference. Ended up buying a Fisch 20mm Forstner to use in the Milescraft but wondering if the Festool version would have a 1/2" chuck?
I saw a YouTube video yesterday about a new and updated version of the Milescraft but evidently, it is three times the price and doesn't look like it can accommodate 1/2" bits.