I almost got into one of those when I came across the Walmart Motorworks sub thread in here. This seemed like getting more into the hobby than the micro subs out there. I don't have the money upfront to purchase some of the bigger/nice true sub kits out there, but I wanted something I could start learning concept with. The micro subs as I understand them use 2 thrusters as their propulsion. These are movable but fixed before operation. Your diving is therefore preset. This seemed very limited to me and i kept coming away feeling like these were a water version of ZipZap/*****ARGER micro cars. Sure they could be fun, but for a little more I could get something I could customize and get more traditional/realistic operation.
Sure, the Walmart sub isn't scale and uses side thrusters for left/right operation, but it also is highly moddable Again, check that thread out. It started me on the ideas of ballast, trimming a sub and basic handling of a sub while submersed. All for $20. I really think you would have a hard time beating that. There is also some "cool" factor with this "toy" sub. It looks like a nuclear sub and runs along the surface for all to see it. This sub got me hooked into RC Subs and I am currently searching for my next project: to convert a plastic "static" model into a dynamic diving sub. If you have any questions on the Walmart sub, email me. I 'll be glad to give you my experiences with it. Good luck! Have fun and share your fun!
Shane
RC Sumo

Oh yeah, almost forgot:
thread link: http://www.rcuniverse.com/forum/Walm...1397464/tm.htm