Back to KJ's original question - I have a "vintage" Glendenning synch. By appearance, it looks pretty close to what they're selling today. It was inoperative when I got the boat. Took about 2 hours and $2 to get it functioning (prior owner fancied himself an electrician, I think). It works like a champ and I found the single stick operation not hard to get used to and somewhat useful. As others have mentioned, I do not use it in traffic areas or close quarters. Glad I have it, but I don't think I'd spend the $ to equip if I didn't.