Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
Thule bicycle carriers have a threaded hole that can use either a hex-head bolt (provided with the rack) or one of these secure bolts to attach the bike rack to the hitch receiver.

The Snug-Tite Lock has a cover that locks over the head of a stainless steel bolt to keep a thief from using a wrench to steal the carrier.  It looks like it will stop casual theft by requiring a thief to cut off the cover before unscrewing the bolt.

It seems a bit pricy for a lock, but the bike carrier is an expensive enough item to make some precautions worthwhile.  I was able to save a few dollars on both the rack and the Snug-Tite lock by shopping around.

After a few weeks of use, I found that the Snug-Tite Lock's bolt had backed out slightly from vibration, letting the rack become slightly loose in the hitch receiver. Application of a mild thread locking compound (Blue Loc-Tight or similar) solved the problem.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: B: positive