I've always chuckled at terms like "full access" when referring to frameless, as even if your cabinets have 3/4" sides, you still have the space behind the face-frame, it's the "opening" that full access... and what are you really talking about? 1"-1-1/2" difference (depending on how thick your sides are), which basically means nothing... and that's not taking into account the hinges used in frameless to make them work...
Not to mention justifying going with thinner sides on drawers from 3/4" to 1/2", you're "gaining" 1/2", which again amounts to nothing in most cases...