i had 1 of these & it was ok, but if i had it to do over i might get 1 of the aluminum tray-type 1s (i had a steel tray-type too, which was pretty heavy to install & remove). now i have a truck, so no problems.
hey raoul, i have more info for you on those booster springs. my mechanic got the part # & even got the parts, which he can send you if you want them (or if not, he can return them). it is carquest part #83061. they are 1500lb. heavy duty coil spring helpers. they bolt on above the leaf springs with u-bolts, looks very simple. let me know if you want 'em.
for you other guys, i had these installed on an explorer for carrying a bike on the back, made a huge difference--the headlights no longer pointed almost straight up. made the car handle better even with out a load on the back. if you are going to make a regular practice of hitching a bike to the back, i recommend them. they were about $70 + about $30 or so to install.