I agree, the locking clip is absolutely acceptable with a Husky and an ELR belt, I'd feel much safer for my own kid in a locking clipped Husky than a booster (a younger kid, of course...over age 7 or so, I'd probably go booster).
Bethany is 5.5yo, will be 6 in July. 90% of the time she rides in my car in a Husky (using LATCH). We had the Husky installed in dh's car for a long time (close to 2yrs... she outgrew her convertibles by height at 3/3.5yo) installed in the center with a lap belt. When our son was born we moved her outboard and I did the long belt path as per Britax's instructions, but it kept slipping. Beth rarely rides w/ dh and actually during that time period she was riding w/ him only 3-4x/month (before she started going to school).
Meanwhile, we were using her turbobooster as a back up seat. We "practiced" w/ it for two weeks before Ben was born since she was going to ride in it in my friend's car during the time of the birth. Beth was involved in picking it out and fell in love w/ her seat. We had long discussions about how it was only for emergencies and that her other seats kept her safer, etc. She does great w/ the booster and of course likes it better than the Husky.
When we finally figured out that I was going to need to reinstall the Husky w/ a locking clip we weighed all of our options. One of my friends was also looking for a higher weight seat for her son who had already outgrown his AOE and we needed to get Ben is Boulevard. So based on Beth's age, and the small amount of time she's in dh's car, we decided that she would be fine in the Turbobooster.
If we had these issues in our main car, I would have definitely opted to use a locking clip and kept the Husky, but she really doesn't ride that much in it and when balancing everything out... it made the most sense for us at this time.
