The received product was actually the inferior Am-Tech S2900 Helping Hand, not the advertised Rolson 60335. This appears fairly robust, is easily adjustable, and grips small objects securely. On arrival, it works well but I'm not sure how well the joints will work after continued use.
A note of caution if you plan to use this for hobbyist electronics: the clips leave obvious scratch marks on printed circuit boards. The clips are firm enough to secure objects through a small piece of padding material though. This is a little inconvenient, but not a huge problem.