Just bought an Abus Mini U-Lock ($45) and have found it to be much more convenient than the cheapo coiling cable lock with "Word Combination" that I have been using. I've always been nervous about the cable word lock anyway, even if it is thicker than the cheapest ones. The 3"x5" mini u-lock, regardless of brand, fits in my back pocket and so far has been fine for locking up for the short time that I use it. It's big enough that I can loop it through my top tube or seat tube, and is much faster to pull out of my pocket and use a key than fiddle with a four letter word combination. Downside is 2.5 pounds in weight compared to maybe 1.5 pounds, and I have to have a key with me. Glad I didn't buy a bigger heavier one.

More concerned about the pricier front and rear light and cycle computer that I have to decide each time whether to remove or leave for the 20 minutes I walk away.